java.lang.Object
- com.microsoft.z3.Z3Object
- - com.microsoft.z3.Solver

```
public class Solver
extends Z3Object
```
Solvers.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`add(BoolExpr... constraints)`	Assert a multiple constraints into the solver.
`void`	`assertAndTrack(BoolExpr[] constraints, BoolExpr[] ps)`	Assert multiple constraints into the solver, and track them (in the unsat) core using the Boolean constants in ps.
`void`	`assertAndTrack(BoolExpr constraint, BoolExpr p)`	Assert a constraint into the solver, and track it (in the unsat) core using the Boolean constant p.
`Status`	`check()`	Checks whether the assertions in the solver are consistent or not.
`Status`	`check(Expr... assumptions)`	Checks whether the assertions in the solver are consistent or not.
`void`	`fromFile(String file)`
`void`	`fromString(String str)`
`BoolExpr[]`	`getAssertions()`	The set of asserted formulas.
`Status`	`getConsequences(BoolExpr[] assumptions, Expr[] variables, List<BoolExpr> consequences)`	Retrieve fixed assignments to the set of variables in the form of consequences.
`String`	`getHelp()`	A string that describes all available solver parameters.
`Model`	`getModel()`	The model of the last `Check`.
`int`	`getNumAssertions()`	The number of assertions in the solver.
`int`	`getNumScopes()`	The current number of backtracking points (scopes).
`ParamDescrs`	`getParameterDescriptions()`	Retrieves parameter descriptions for solver.
`Expr`	`getProof()`	The proof of the last `Check`.
`String`	`getReasonUnknown()`	A brief justification of why the last call to `Check` returned `UNKNOWN`.
`Statistics`	`getStatistics()`	Solver statistics.
`BoolExpr[]`	`getUnsatCore()`	The unsat core of the last `Check`.
`void`	`interrupt()`	Interrupt the execution of the solver object.
`void`	`pop()`	Backtracks one backtracking point.
`void`	`pop(int n)`	Backtracks `n` backtracking points.
`void`	`push()`	Creates a backtracking point.
`void`	`reset()`	Resets the Solver.
`void`	`setParameters(Params value)`	Sets the solver parameters.
`String`	`toString()`	A string representation of the solver.
`Solver`	`translate(Context ctx)`	Create a clone of the current solver with respect to`ctx`.

Methods inherited from class com.microsoft.z3.Z3Object
arrayLength, arrayToNative

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Method Detail
  - getHelp
```
public String getHelp()
```
    A string that describes all available solver parameters.
  - setParameters
```
public void setParameters(Params value)
```
    Sets the solver parameters.
    
    Throws:
    
    Z3Exception
  - getParameterDescriptions
```
public ParamDescrs getParameterDescriptions()
```
    Retrieves parameter descriptions for solver.
    
    Throws:
    
    Z3Exception
  - getNumScopes
```
public int getNumScopes()
```
    The current number of backtracking points (scopes).
    
    See Also:
    
    pop(), push()
  - push
```
public void push()
```
    Creates a backtracking point.
    
    See Also:
    
    pop()
  - pop
```
public void pop()
```
    Backtracks one backtracking point. Remarks: .
  - pop
```
public void pop(int n)
```
    Backtracks n backtracking points. Remarks: Note that an exception is thrown if n is not smaller than NumScopes
    
    See Also:
    
    push()
  - reset
```
public void reset()
```
    Resets the Solver. Remarks: This removes all assertions from the solver.
  - interrupt
```
public void interrupt()
```
    Interrupt the execution of the solver object. Remarks: This ensures that the interrupt applies only to the given solver object and it applies only if it is running.
  - add
```
public void add(BoolExpr... constraints)
```
    Assert a multiple constraints into the solver.
    
    Throws:
    
    Z3Exception
  - assertAndTrack
```
public void assertAndTrack(BoolExpr[] constraints,
                           BoolExpr[] ps)
```
    Assert multiple constraints into the solver, and track them (in the unsat) core using the Boolean constants in ps. Remarks: This API is an alternative to check() with assumptions for extracting unsat cores. Both APIs can be used in the same solver. The unsat core will contain a combination of the Boolean variables provided using #assertAndTrack and the Boolean literals provided using check() with assumptions.
  - assertAndTrack
```
public void assertAndTrack(BoolExpr constraint,
                           BoolExpr p)
```
    Assert a constraint into the solver, and track it (in the unsat) core using the Boolean constant p. Remarks: This API is an alternative to check(com.microsoft.z3.Expr...) with assumptions for extracting unsat cores. Both APIs can be used in the same solver. The unsat core will contain a combination of the Boolean variables provided using assertAndTrack(com.microsoft.z3.BoolExpr[], com.microsoft.z3.BoolExpr[]) and the Boolean literals provided using check(com.microsoft.z3.Expr...) with assumptions.
  - fromFile
```
public void fromFile(String file)
```
  - fromString
```
public void fromString(String str)
```
  - getNumAssertions
```
public int getNumAssertions()
```
    The number of assertions in the solver.
    
    Throws:
    
    Z3Exception
  - getAssertions
```
public BoolExpr[] getAssertions()
```
    The set of asserted formulas.
    
    Throws:
    
    Z3Exception
  - check
```
public Status check(Expr... assumptions)
```
    Checks whether the assertions in the solver are consistent or not. Remarks:
    
    See Also:
    
    getModel(), getUnsatCore(), getProof()
  - check
```
public Status check()
```
    Checks whether the assertions in the solver are consistent or not. Remarks:
    
    See Also:
    
    getModel(), getUnsatCore(), getProof()
  - getConsequences
```
public Status getConsequences(BoolExpr[] assumptions,
                              Expr[] variables,
                              List<BoolExpr> consequences)
```
    Retrieve fixed assignments to the set of variables in the form of consequences. Each consequence is an implication of the form relevant-assumptions Implies variable = value where the relevant assumptions is a subset of the assumptions that are passed in and the equality on the right side of the implication indicates how a variable is fixed.
  - getModel
```
public Model getModel()
```
    The model of the last Check. Remarks: The result is null if Check was not invoked before, if its results was not SATISFIABLE, or if model production is not enabled.
    
    Throws:
    
    Z3Exception
  - getProof
```
public Expr getProof()
```
    The proof of the last Check. Remarks: The result is null if Check was not invoked before, if its results was not UNSATISFIABLE, or if proof production is disabled.
    
    Throws:
    
    Z3Exception
  - getUnsatCore
```
public BoolExpr[] getUnsatCore()
```
    The unsat core of the last Check. Remarks: The unsat core is a subset of Assertions The result is empty if Check was not invoked before, if its results was not UNSATISFIABLE, or if core production is disabled.
    
    Throws:
    
    Z3Exception
  - getReasonUnknown
```
public String getReasonUnknown()
```
    A brief justification of why the last call to Check returned UNKNOWN.
  - translate
```
public Solver translate(Context ctx)
```
    Create a clone of the current solver with respect toctx.
  - getStatistics
```
public Statistics getStatistics()
```
    Solver statistics.
    
    Throws:
    
    Z3Exception
  - toString
```
public String toString()
```
    A string representation of the solver.
    
    Overrides:
    
    toString in class Object

Class Solver

Method Summary

Methods inherited from class com.microsoft.z3.Z3Object

Methods inherited from class java.lang.Object

Method Detail

getHelp

setParameters

getParameterDescriptions

getNumScopes

push

pop

pop

reset

interrupt

add

assertAndTrack

assertAndTrack

fromFile

fromString

getNumAssertions

getAssertions

check

check

getConsequences

getModel

getProof

getUnsatCore

getReasonUnknown

translate

getStatistics

toString