/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-Persistent-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-98707888a4ba860d5b57d27ee0e051c5b948cbbf-9870788 [2021-06-02 05:06:51,722 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-02 05:06:51,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-02 05:06:51,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-02 05:06:51,801 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-POR-Persistent-NoLbe.epf [2021-06-02 05:06:51,820 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-02 05:06:51,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-02 05:06:51,820 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-02 05:06:51,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-02 05:06:51,822 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-02 05:06:51,822 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-02 05:06:51,822 INFO L138 SettingsManager]: * Use SBE=true [2021-06-02 05:06:51,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-02 05:06:51,822 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-02 05:06:51,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-02 05:06:51,822 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-02 05:06:51,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-02 05:06:51,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-02 05:06:51,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-02 05:06:51,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-02 05:06:51,823 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-02 05:06:51,823 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-02 05:06:51,823 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-02 05:06:51,823 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-02 05:06:51,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-02 05:06:51,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-02 05:06:51,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-02 05:06:51,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-02 05:06:51,824 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-02 05:06:51,824 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-02 05:06:51,824 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-02 05:06:51,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-02 05:06:51,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-02 05:06:51,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-02 05:06:51,825 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-02 05:06:51,825 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2021-06-02 05:06:51,825 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-02 05:06:51,825 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=PERSISTENT_SETS [2021-06-02 05:06:51,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-02 05:06:52,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-02 05:06:52,147 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-02 05:06:52,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-02 05:06:52,151 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-02 05:06:52,152 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-02 05:06:52,153 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl [2021-06-02 05:06:52,153 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ForkInLoop02-Incrementer.bpl' [2021-06-02 05:06:52,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-02 05:06:52,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-02 05:06:52,189 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-02 05:06:52,189 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-02 05:06:52,189 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-02 05:06:52,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/1) ... [2021-06-02 05:06:52,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/1) ... [2021-06-02 05:06:52,216 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-02 05:06:52,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-02 05:06:52,217 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-02 05:06:52,217 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-02 05:06:52,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/1) ... [2021-06-02 05:06:52,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/1) ... [2021-06-02 05:06:52,223 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/1) ... [2021-06-02 05:06:52,223 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/1) ... [2021-06-02 05:06:52,225 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/1) ... [2021-06-02 05:06:52,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/1) ... [2021-06-02 05:06:52,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/1) ... [2021-06-02 05:06:52,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-02 05:06:52,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-02 05:06:52,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-02 05:06:52,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-02 05:06:52,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-02 05:06:52,302 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-06-02 05:06:52,302 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-06-02 05:06:52,302 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-06-02 05:06:52,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-02 05:06:52,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-02 05:06:52,304 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-02 05:06:52,434 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-02 05:06:52,434 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-06-02 05:06:52,436 INFO L202 PluginConnector]: Adding new model ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.06 05:06:52 BoogieIcfgContainer [2021-06-02 05:06:52,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-02 05:06:52,439 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-02 05:06:52,439 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-02 05:06:52,441 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-02 05:06:52,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.06 05:06:52" (1/2) ... [2021-06-02 05:06:52,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6adb4413 and model type ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.06 05:06:52, skipping insertion in model container [2021-06-02 05:06:52,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ForkInLoop02-Incrementer.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.06 05:06:52" (2/2) ... [2021-06-02 05:06:52,446 INFO L111 eAbstractionObserver]: Analyzing ICFG ForkInLoop02-Incrementer.bpl [2021-06-02 05:06:52,455 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-02 05:06:52,456 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-02 05:06:52,456 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-02 05:06:52,457 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-02 05:06:52,493 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-02 05:06:52,521 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:52,574 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:52,574 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:52,574 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:52,574 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:52,574 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:52,574 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:52,574 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:52,575 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of1ForFork0======== [2021-06-02 05:06:52,673 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:52,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:52,678 INFO L82 PathProgramCache]: Analyzing trace with hash 1794996862, now seen corresponding path program 1 times [2021-06-02 05:06:52,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:52,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705985221] [2021-06-02 05:06:52,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:52,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-02 05:06:52,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:52,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705985221] [2021-06-02 05:06:52,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705985221] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:52,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:52,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:06:52,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372234615] [2021-06-02 05:06:52,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:06:52,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:52,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:06:52,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:06:52,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:52,864 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:52,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:52,869 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:52,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:52,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-02 05:06:52,943 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of1ForFork0 was SAFE (1/3) [2021-06-02 05:06:52,944 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:52,960 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:52,960 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:52,961 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:52,961 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:52,961 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:52,961 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:52,961 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:52,961 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:53,018 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (2/3) [2021-06-02 05:06:53,019 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:53,028 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:53,029 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:53,029 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:53,029 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:53,029 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:53,029 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:53,029 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:53,029 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-02 05:06:53,086 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-02 05:06:53,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:53,087 INFO L82 PathProgramCache]: Analyzing trace with hash 42091268, now seen corresponding path program 1 times [2021-06-02 05:06:53,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:53,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339895099] [2021-06-02 05:06:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:53,095 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:53,102 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:53,115 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:53,116 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:53,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-02 05:06:53,124 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (3/3) [2021-06-02 05:06:53,124 WARN L243 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-02 05:06:53,125 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-06-02 05:06:53,135 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-02 05:06:53,136 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:53,147 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:53,147 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:53,147 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:53,147 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:53,147 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:53,147 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:53,147 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:53,147 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:53,280 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (1/4) [2021-06-02 05:06:53,280 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:53,292 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:53,293 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:53,293 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:53,293 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:53,293 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:53,293 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:53,293 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:53,293 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:53,394 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-02 05:06:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:53,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1624858962, now seen corresponding path program 1 times [2021-06-02 05:06:53,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:53,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134554107] [2021-06-02 05:06:53,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:53,408 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:53,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:53,416 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:53,418 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:53,418 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:53,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-02 05:06:53,424 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/4) [2021-06-02 05:06:53,424 WARN L243 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-02 05:06:53,424 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-06-02 05:06:53,432 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-02 05:06:53,433 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:53,439 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:53,440 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:53,440 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:53,440 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:53,440 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:53,440 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:53,440 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:53,440 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of3ForFork0======== Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:53,541 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:53,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:53,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1006356384, now seen corresponding path program 1 times [2021-06-02 05:06:53,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:53,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351674566] [2021-06-02 05:06:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-02 05:06:53,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:53,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351674566] [2021-06-02 05:06:53,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351674566] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:53,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:53,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:06:53,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039839747] [2021-06-02 05:06:53,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:06:53,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:53,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:06:53,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:06:53,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:53,594 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:53,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:53,594 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:53,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:53,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-02 05:06:53,637 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:53,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:53,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1132277107, now seen corresponding path program 1 times [2021-06-02 05:06:53,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:53,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951091639] [2021-06-02 05:06:53,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-02 05:06:53,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:53,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951091639] [2021-06-02 05:06:53,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951091639] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:53,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:53,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:06:53,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445726861] [2021-06-02 05:06:53,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:06:53,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:53,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:06:53,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:06:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:53,669 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:53,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:53,669 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:53,669 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:53,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:06:53,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-02 05:06:53,787 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:53,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:53,787 INFO L82 PathProgramCache]: Analyzing trace with hash 1891916684, now seen corresponding path program 1 times [2021-06-02 05:06:53,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:53,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94279272] [2021-06-02 05:06:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:53,794 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:53,803 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:53,805 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:53,805 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:53,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-02 05:06:53,806 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of3ForFork0 was UNSAFE (1/5) [2021-06-02 05:06:53,808 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:53,852 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:53,852 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:53,852 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:53,852 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:53,852 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:53,852 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:53,852 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:53,852 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of3ForFork0======== [2021-06-02 05:06:53,932 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:53,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:53,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1816523033, now seen corresponding path program 1 times [2021-06-02 05:06:53,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:53,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949783638] [2021-06-02 05:06:53,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-02 05:06:53,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:53,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949783638] [2021-06-02 05:06:53,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949783638] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:53,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:53,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:06:53,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241821503] [2021-06-02 05:06:53,951 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:06:53,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:53,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:06:53,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:06:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:53,952 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:53,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:53,952 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:53,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:53,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-02 05:06:53,989 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:53,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:53,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1816523994, now seen corresponding path program 1 times [2021-06-02 05:06:53,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:53,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634562780] [2021-06-02 05:06:53,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-02 05:06:54,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:54,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634562780] [2021-06-02 05:06:54,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634562780] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:54,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:54,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:06:54,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354831085] [2021-06-02 05:06:54,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:06:54,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:54,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:06:54,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:06:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:54,015 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:54,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:54,015 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:54,015 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:54,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:54,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:06:54,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-02 05:06:54,056 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:54,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash 477669121, now seen corresponding path program 1 times [2021-06-02 05:06:54,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:54,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952766684] [2021-06-02 05:06:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:54,063 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:54,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:54,067 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:54,069 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:54,069 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:54,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-02 05:06:54,070 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of3ForFork0 was UNSAFE (2/5) [2021-06-02 05:06:54,071 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:54,082 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:54,083 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:54,083 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:54,083 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:54,083 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:54,083 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:54,083 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:54,083 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:54,328 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (3/5) [2021-06-02 05:06:54,329 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:54,339 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:54,339 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:54,339 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:54,339 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:54,339 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:54,339 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:54,340 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:54,340 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of3ForFork0======== Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:54,382 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:54,383 INFO L82 PathProgramCache]: Analyzing trace with hash -459303287, now seen corresponding path program 1 times [2021-06-02 05:06:54,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:54,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483133707] [2021-06-02 05:06:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-02 05:06:54,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:54,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483133707] [2021-06-02 05:06:54,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483133707] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:54,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:54,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:06:54,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377912552] [2021-06-02 05:06:54,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:06:54,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:54,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:06:54,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:06:54,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:54,398 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:54,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:54,398 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:54,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-02 05:06:54,435 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:54,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:54,436 INFO L82 PathProgramCache]: Analyzing trace with hash 981561315, now seen corresponding path program 1 times [2021-06-02 05:06:54,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:54,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23849543] [2021-06-02 05:06:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:54,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:54,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-02 05:06:54,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:54,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23849543] [2021-06-02 05:06:54,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23849543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-02 05:06:54,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875479473] [2021-06-02 05:06:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-02 05:06:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:54,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-02 05:06:54,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-02 05:06:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-02 05:06:54,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875479473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-02 05:06:54,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-02 05:06:54,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-02 05:06:54,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427856794] [2021-06-02 05:06:54,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:06:54,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:54,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:06:54,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:06:54,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:54,573 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:54,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:54,573 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:54,573 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:54,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:06:54,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-02 05:06:54,847 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:54,848 INFO L82 PathProgramCache]: Analyzing trace with hash -233311345, now seen corresponding path program 1 times [2021-06-02 05:06:54,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:54,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571209925] [2021-06-02 05:06:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:54,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:54,853 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:54,856 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:54,857 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:54,857 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:54,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-02 05:06:54,859 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of3ForFork0 was UNSAFE (4/5) [2021-06-02 05:06:54,859 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:54,869 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:54,869 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:54,869 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:54,869 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:54,869 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:54,870 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:54,870 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:54,870 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:54,960 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-02 05:06:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:54,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1006373414, now seen corresponding path program 1 times [2021-06-02 05:06:54,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:54,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444188733] [2021-06-02 05:06:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:54,964 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:54,967 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:54,968 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:54,968 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:54,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-02 05:06:54,969 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (5/5) [2021-06-02 05:06:54,969 WARN L243 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-02 05:06:54,969 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-06-02 05:06:54,974 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-02 05:06:54,975 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:55,010 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:55,010 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:55,010 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:55,010 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:55,010 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:55,010 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:55,011 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:55,011 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:55,626 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (1/6) [2021-06-02 05:06:55,626 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:55,642 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:55,642 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:55,642 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:55,642 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:55,642 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:55,642 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:55,642 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:55,642 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:55,945 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-02 05:06:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:55,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1379665844, now seen corresponding path program 1 times [2021-06-02 05:06:55,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:55,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044313299] [2021-06-02 05:06:55,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:55,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:55,951 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:55,958 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:55,962 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:55,962 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:55,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-02 05:06:55,964 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (2/6) [2021-06-02 05:06:55,964 WARN L243 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-02 05:06:55,964 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2021-06-02 05:06:55,974 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-02 05:06:55,975 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:55,983 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:55,983 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:55,983 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:55,983 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:55,983 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:55,983 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:55,983 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:55,983 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of5ForFork0======== Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:56,075 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:56,075 INFO L82 PathProgramCache]: Analyzing trace with hash -836435353, now seen corresponding path program 1 times [2021-06-02 05:06:56,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:56,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132476259] [2021-06-02 05:06:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-02 05:06:56,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:56,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132476259] [2021-06-02 05:06:56,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132476259] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:56,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:56,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:06:56,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755905527] [2021-06-02 05:06:56,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:06:56,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:56,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:06:56,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:06:56,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:56,095 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:56,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:56,096 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:56,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:56,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-02 05:06:56,116 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:56,117 INFO L82 PathProgramCache]: Analyzing trace with hash -159691961, now seen corresponding path program 1 times [2021-06-02 05:06:56,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:56,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357296877] [2021-06-02 05:06:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-02 05:06:56,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:56,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357296877] [2021-06-02 05:06:56,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357296877] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:56,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:56,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:06:56,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722680278] [2021-06-02 05:06:56,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:06:56,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:56,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:06:56,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:06:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:56,159 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:56,160 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:56,160 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:56,160 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:56,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:56,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:06:56,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-02 05:06:56,826 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:56,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:56,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1860877683, now seen corresponding path program 1 times [2021-06-02 05:06:56,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:56,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57899158] [2021-06-02 05:06:56,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:56,831 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:56,833 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:56,834 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:56,834 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:56,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-02 05:06:56,835 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of5ForFork0 was UNSAFE (1/7) [2021-06-02 05:06:56,835 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:56,849 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:56,849 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:56,849 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:56,849 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:56,849 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:56,849 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:56,849 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:56,849 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of5ForFork0======== [2021-06-02 05:06:56,945 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:56,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:56,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1551730264, now seen corresponding path program 1 times [2021-06-02 05:06:56,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:56,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589215804] [2021-06-02 05:06:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:56,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-02 05:06:56,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:56,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589215804] [2021-06-02 05:06:56,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589215804] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:56,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:56,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:06:56,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911799530] [2021-06-02 05:06:56,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:06:56,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:06:56,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:06:56,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:56,965 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:56,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:56,965 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:57,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:57,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-02 05:06:57,476 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:57,476 INFO L82 PathProgramCache]: Analyzing trace with hash -646569277, now seen corresponding path program 1 times [2021-06-02 05:06:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:57,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318317326] [2021-06-02 05:06:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:57,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-02 05:06:57,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:57,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318317326] [2021-06-02 05:06:57,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318317326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-02 05:06:57,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417183898] [2021-06-02 05:06:57,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-02 05:06:57,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:57,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-02 05:06:57,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-02 05:06:57,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-02 05:06:57,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417183898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-02 05:06:57,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-02 05:06:57,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-02 05:06:57,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960732380] [2021-06-02 05:06:57,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:06:57,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:57,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:06:57,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:06:57,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:57,598 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:57,598 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:57,598 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:57,599 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:58,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:58,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:06:58,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-02 05:06:58,257 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:58,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:58,258 INFO L82 PathProgramCache]: Analyzing trace with hash -575590493, now seen corresponding path program 1 times [2021-06-02 05:06:58,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:58,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386158450] [2021-06-02 05:06:58,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:58,261 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:58,263 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:58,264 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:58,265 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:58,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-02 05:06:58,266 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of5ForFork0 was UNSAFE (2/7) [2021-06-02 05:06:58,266 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:58,272 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:58,272 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:58,272 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:58,272 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:58,273 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:58,273 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:58,273 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:58,273 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of5ForFork0======== [2021-06-02 05:06:58,366 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1299891497, now seen corresponding path program 1 times [2021-06-02 05:06:58,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:58,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760645113] [2021-06-02 05:06:58,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:58,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:58,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-02 05:06:58,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:58,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760645113] [2021-06-02 05:06:58,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760645113] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:58,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:58,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:06:58,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203290603] [2021-06-02 05:06:58,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:06:58,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:58,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:06:58,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:06:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:58,383 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:58,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:58,383 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:58,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:58,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-02 05:06:58,412 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:58,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:58,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1300815018, now seen corresponding path program 1 times [2021-06-02 05:06:58,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:58,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347356812] [2021-06-02 05:06:58,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:58,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:58,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-02 05:06:58,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:58,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347356812] [2021-06-02 05:06:58,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347356812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:58,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:58,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-02 05:06:58,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114553163] [2021-06-02 05:06:58,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:06:58,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:58,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:06:58,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:06:58,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:58,432 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:58,432 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:58,432 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:58,432 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:06:58,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-02 05:06:58,458 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:58,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:58,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1300815979, now seen corresponding path program 1 times [2021-06-02 05:06:58,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:58,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173104802] [2021-06-02 05:06:58,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:58,462 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:58,464 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:58,465 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:58,466 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:58,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-02 05:06:58,467 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of5ForFork0 was UNSAFE (3/7) [2021-06-02 05:06:58,467 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:06:58,472 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:58,472 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:58,472 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:58,472 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:58,472 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:58,472 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:58,472 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:58,472 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of5ForFork0======== [2021-06-02 05:06:58,887 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:58,888 INFO L82 PathProgramCache]: Analyzing trace with hash 586675309, now seen corresponding path program 1 times [2021-06-02 05:06:58,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:58,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455659752] [2021-06-02 05:06:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-02 05:06:58,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:58,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455659752] [2021-06-02 05:06:58,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455659752] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:58,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:58,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:06:58,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773481704] [2021-06-02 05:06:58,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:06:58,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:58,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:06:58,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:06:58,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:58,904 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:58,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:58,904 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:59,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:59,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-02 05:06:59,077 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1474178990, now seen corresponding path program 1 times [2021-06-02 05:06:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:59,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623783618] [2021-06-02 05:06:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:06:59,097 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-02 05:06:59,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:06:59,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623783618] [2021-06-02 05:06:59,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623783618] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:06:59,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:06:59,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-02 05:06:59,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223116209] [2021-06-02 05:06:59,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:06:59,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:06:59,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:06:59,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:06:59,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:59,098 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:06:59,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:06:59,098 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:59,098 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:06:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:06:59,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:06:59,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-02 05:06:59,351 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:06:59,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:06:59,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1475102511, now seen corresponding path program 1 times [2021-06-02 05:06:59,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:06:59,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723203441] [2021-06-02 05:06:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:06:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:59,364 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:06:59,373 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:06:59,375 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:06:59,375 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:06:59,375 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-02 05:06:59,376 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of5ForFork0 was UNSAFE (4/7) [2021-06-02 05:06:59,376 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:06:59,399 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:06:59,399 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:06:59,400 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:06:59,400 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:06:59,400 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:06:59,400 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:06:59,400 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:06:59,400 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:01,554 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (5/7) [2021-06-02 05:07:01,554 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:01,559 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:07:01,559 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:07:01,559 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:07:01,559 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:07:01,559 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:07:01,559 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:07:01,559 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:07:01,559 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-02 05:07:02,687 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-02 05:07:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:02,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1493509120, now seen corresponding path program 1 times [2021-06-02 05:07:02,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:02,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075404416] [2021-06-02 05:07:02,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:02,690 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:02,692 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:02,693 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:07:02,694 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:07:02,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-02 05:07:02,694 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (6/7) [2021-06-02 05:07:02,694 WARN L243 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-02 05:07:02,694 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2021-06-02 05:07:02,703 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-02 05:07:02,703 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:02,711 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:07:02,711 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:07:02,711 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:07:02,711 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:07:02,711 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:07:02,711 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:07:02,711 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:07:02,712 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of6ForFork0======== [2021-06-02 05:07:04,043 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:04,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:04,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1242147672, now seen corresponding path program 1 times [2021-06-02 05:07:04,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:04,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645109025] [2021-06-02 05:07:04,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:04,057 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-02 05:07:04,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:04,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645109025] [2021-06-02 05:07:04,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645109025] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:04,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:04,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:07:04,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842747751] [2021-06-02 05:07:04,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:07:04,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:04,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:07:04,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:07:04,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:04,059 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:04,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:04,059 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:05,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-02 05:07:05,962 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:05,963 INFO L82 PathProgramCache]: Analyzing trace with hash 148128073, now seen corresponding path program 1 times [2021-06-02 05:07:05,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:05,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747169348] [2021-06-02 05:07:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:05,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:05,981 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-02 05:07:05,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:05,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747169348] [2021-06-02 05:07:05,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747169348] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:05,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:05,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:07:05,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031552781] [2021-06-02 05:07:05,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:07:05,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:05,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:07:05,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:07:05,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:05,982 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:05,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:05,982 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:05,982 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:08,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:07:08,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-02 05:07:08,034 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:08,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:08,034 INFO L82 PathProgramCache]: Analyzing trace with hash 617167143, now seen corresponding path program 1 times [2021-06-02 05:07:08,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:08,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359987427] [2021-06-02 05:07:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:08,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:08,038 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:08,041 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:08,043 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:07:08,048 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:07:08,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-02 05:07:08,050 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of6ForFork0 was UNSAFE (1/8) [2021-06-02 05:07:08,050 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:08,056 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:07:08,056 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:07:08,056 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:07:08,056 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:07:08,057 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:07:08,057 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:07:08,057 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:07:08,057 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of6ForFork0======== [2021-06-02 05:07:08,488 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:08,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1923109439, now seen corresponding path program 1 times [2021-06-02 05:07:08,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:08,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071912964] [2021-06-02 05:07:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-02 05:07:08,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:08,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071912964] [2021-06-02 05:07:08,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071912964] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:08,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:08,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:07:08,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886861661] [2021-06-02 05:07:08,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:07:08,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:08,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:07:08,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:07:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:08,508 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:08,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:08,508 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:08,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-02 05:07:08,923 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:08,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:08,923 INFO L82 PathProgramCache]: Analyzing trace with hash 513149780, now seen corresponding path program 1 times [2021-06-02 05:07:08,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:08,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128259448] [2021-06-02 05:07:08,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-02 05:07:08,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:08,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128259448] [2021-06-02 05:07:08,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128259448] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:08,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:08,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:07:08,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860531933] [2021-06-02 05:07:08,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:07:08,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:08,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:07:08,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:07:08,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:08,948 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:08,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:08,949 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:08,949 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:07:09,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-02 05:07:09,359 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:09,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:09,359 INFO L82 PathProgramCache]: Analyzing trace with hash -784290574, now seen corresponding path program 1 times [2021-06-02 05:07:09,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:09,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590537515] [2021-06-02 05:07:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:09,363 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:09,365 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:09,366 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:07:09,366 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:07:09,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-02 05:07:09,367 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of6ForFork0 was UNSAFE (2/8) [2021-06-02 05:07:09,367 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:09,387 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:07:09,388 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:07:09,388 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:07:09,388 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:07:09,388 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:07:09,388 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:07:09,388 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:07:09,388 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of6ForFork0======== [2021-06-02 05:07:09,503 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:09,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:09,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1806959342, now seen corresponding path program 1 times [2021-06-02 05:07:09,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:09,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522161101] [2021-06-02 05:07:09,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:09,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-02 05:07:09,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:09,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522161101] [2021-06-02 05:07:09,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522161101] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:09,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:09,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:07:09,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998370765] [2021-06-02 05:07:09,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:07:09,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:09,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:07:09,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:07:09,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:09,517 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:09,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:09,518 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:09,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:09,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-02 05:07:09,541 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:09,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:09,542 INFO L82 PathProgramCache]: Analyzing trace with hash -181164505, now seen corresponding path program 1 times [2021-06-02 05:07:09,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:09,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602298812] [2021-06-02 05:07:09,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:09,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-02 05:07:09,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:09,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602298812] [2021-06-02 05:07:09,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602298812] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:09,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:09,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:07:09,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097400723] [2021-06-02 05:07:09,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:07:09,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:09,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:07:09,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:07:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:09,560 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:09,560 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:09,560 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:09,560 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:12,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:07:12,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-06-02 05:07:12,243 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:12,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:12,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1405418071, now seen corresponding path program 1 times [2021-06-02 05:07:12,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:12,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611619773] [2021-06-02 05:07:12,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:12,246 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:12,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:12,248 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:12,249 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:07:12,249 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:07:12,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-06-02 05:07:12,250 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of6ForFork0 was UNSAFE (3/8) [2021-06-02 05:07:12,250 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:07:12,266 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:07:12,266 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:07:12,266 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:07:12,266 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:07:12,266 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:07:12,266 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:07:12,266 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:07:12,266 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread1of6ForFork0======== Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:12,364 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:12,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:12,365 INFO L82 PathProgramCache]: Analyzing trace with hash 485242799, now seen corresponding path program 1 times [2021-06-02 05:07:12,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:12,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190040227] [2021-06-02 05:07:12,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:12,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-02 05:07:12,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:12,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190040227] [2021-06-02 05:07:12,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190040227] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:12,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:12,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:07:12,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465337143] [2021-06-02 05:07:12,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:07:12,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:12,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:07:12,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:07:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:12,383 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:12,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:12,383 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:14,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:14,573 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-06-02 05:07:14,573 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:14,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:14,573 INFO L82 PathProgramCache]: Analyzing trace with hash -549838821, now seen corresponding path program 1 times [2021-06-02 05:07:14,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:14,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727488774] [2021-06-02 05:07:14,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-02 05:07:14,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:14,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727488774] [2021-06-02 05:07:14,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727488774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-02 05:07:14,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787102914] [2021-06-02 05:07:14,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-02 05:07:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:14,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-02 05:07:14,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-02 05:07:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-02 05:07:14,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787102914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-02 05:07:14,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-02 05:07:14,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-02 05:07:14,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256131650] [2021-06-02 05:07:14,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:07:14,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:14,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:07:14,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:07:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:14,770 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:14,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:14,770 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:14,771 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:16,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:07:17,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-02 05:07:17,181 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:17,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:17,181 INFO L82 PathProgramCache]: Analyzing trace with hash -603648953, now seen corresponding path program 1 times [2021-06-02 05:07:17,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:17,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009184929] [2021-06-02 05:07:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:17,184 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:17,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:17,186 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:17,187 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:07:17,187 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:07:17,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-06-02 05:07:17,188 INFO L301 ceAbstractionStarter]: Result for error location fooThread1of6ForFork0 was UNSAFE (4/8) [2021-06-02 05:07:17,188 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:07:17,200 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:07:17,200 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:07:17,200 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:07:17,200 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:07:17,200 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:07:17,200 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:07:17,200 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:07:17,200 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:30,416 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (5/8) [2021-06-02 05:07:30,416 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:30,422 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:07:30,422 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:07:30,422 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:07:30,422 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:07:30,422 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:07:30,422 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:07:30,423 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:07:30,423 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of6ForFork0======== [2021-06-02 05:07:30,532 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1097914040, now seen corresponding path program 1 times [2021-06-02 05:07:30,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:30,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810011985] [2021-06-02 05:07:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:30,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-02 05:07:30,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:30,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810011985] [2021-06-02 05:07:30,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810011985] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:30,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:30,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:07:30,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638547477] [2021-06-02 05:07:30,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:07:30,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:30,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:07:30,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:07:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:30,550 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:30,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:30,550 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:30,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-06-02 05:07:30,571 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:30,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:30,571 INFO L82 PathProgramCache]: Analyzing trace with hash 1098837561, now seen corresponding path program 1 times [2021-06-02 05:07:30,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:30,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324261977] [2021-06-02 05:07:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-02 05:07:30,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:30,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324261977] [2021-06-02 05:07:30,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324261977] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:30,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:30,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-02 05:07:30,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766431049] [2021-06-02 05:07:30,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:07:30,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:30,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:07:30,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:07:30,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:30,596 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:30,596 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:30,596 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:30,596 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:30,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:07:30,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-06-02 05:07:30,635 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1098838522, now seen corresponding path program 1 times [2021-06-02 05:07:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:30,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840499223] [2021-06-02 05:07:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:30,638 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:30,639 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:30,640 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:07:30,640 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:07:30,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-06-02 05:07:30,641 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of6ForFork0 was UNSAFE (6/8) [2021-06-02 05:07:30,642 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:07:30,648 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:07:30,648 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:07:30,648 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:07:30,648 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:07:30,648 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:07:30,649 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:07:30,649 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:07:30,649 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:37,176 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-02 05:07:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:37,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1923078110, now seen corresponding path program 1 times [2021-06-02 05:07:37,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:37,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777965373] [2021-06-02 05:07:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:37,179 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:37,180 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:37,181 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:07:37,182 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:07:37,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-06-02 05:07:37,182 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (7/8) [2021-06-02 05:07:37,182 WARN L243 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-02 05:07:37,182 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2021-06-02 05:07:37,198 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-02 05:07:37,199 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:37,203 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:07:37,203 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:07:37,203 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:07:37,203 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:07:37,203 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:07:37,203 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:07:37,204 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:07:37,204 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of7ForFork0======== [2021-06-02 05:07:37,647 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:37,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:37,647 INFO L82 PathProgramCache]: Analyzing trace with hash -324790659, now seen corresponding path program 1 times [2021-06-02 05:07:37,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:37,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612840246] [2021-06-02 05:07:37,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-02 05:07:37,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:37,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612840246] [2021-06-02 05:07:37,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612840246] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:37,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:37,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:07:37,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891683334] [2021-06-02 05:07:37,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:07:37,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:37,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:07:37,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:07:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:37,663 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:37,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:37,663 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:38,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:38,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-06-02 05:07:38,042 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:38,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:38,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1478575556, now seen corresponding path program 1 times [2021-06-02 05:07:38,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:38,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911846250] [2021-06-02 05:07:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:07:38,067 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-02 05:07:38,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:07:38,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911846250] [2021-06-02 05:07:38,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911846250] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:07:38,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:07:38,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:07:38,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999580723] [2021-06-02 05:07:38,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:07:38,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:07:38,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:07:38,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:07:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:38,068 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:07:38,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:07:38,068 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:38,068 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:07:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:07:38,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:07:38,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-06-02 05:07:38,438 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:07:38,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:07:38,439 INFO L82 PathProgramCache]: Analyzing trace with hash 723076946, now seen corresponding path program 1 times [2021-06-02 05:07:38,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:07:38,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570318615] [2021-06-02 05:07:38,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:07:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:38,441 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:07:38,443 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:07:38,444 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:07:38,444 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:07:38,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-02 05:07:38,445 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of7ForFork0 was UNSAFE (1/9) [2021-06-02 05:07:38,446 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:07:38,454 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:07:38,454 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:07:38,454 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:07:38,454 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:07:38,454 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:07:38,454 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:07:38,454 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:07:38,454 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== [2021-06-02 05:09:52,227 INFO L301 ceAbstractionStarter]: Result for error location foo was SAFE (2/9) [2021-06-02 05:09:52,228 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:09:52,237 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:09:52,237 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:09:52,237 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:09:52,237 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:09:52,237 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:09:52,237 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:09:52,237 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:09:52,238 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of7ForFork0======== [2021-06-02 05:09:52,361 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:09:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:09:52,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1484731330, now seen corresponding path program 1 times [2021-06-02 05:09:52,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:09:52,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447963891] [2021-06-02 05:09:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:09:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:09:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-02 05:09:52,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:09:52,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447963891] [2021-06-02 05:09:52,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447963891] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:09:52,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:09:52,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:09:52,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917247477] [2021-06-02 05:09:52,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:09:52,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:09:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:09:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:09:52,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:09:52,375 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:09:52,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:09:52,376 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:09:52,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:09:52,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-06-02 05:09:52,395 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:09:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:09:52,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1217968493, now seen corresponding path program 1 times [2021-06-02 05:09:52,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:09:52,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802234026] [2021-06-02 05:09:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:09:52,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:09:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-02 05:09:52,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:09:52,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802234026] [2021-06-02 05:09:52,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802234026] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:09:52,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:09:52,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:09:52,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234265647] [2021-06-02 05:09:52,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:09:52,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:09:52,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:09:52,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:09:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:09:52,415 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:09:52,415 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:09:52,415 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:09:52,415 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:10:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:10:11,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:10:11,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-06-02 05:10:11,055 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:10:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:10:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash -108466531, now seen corresponding path program 1 times [2021-06-02 05:10:11,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:10:11,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240299959] [2021-06-02 05:10:11,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:10:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:10:11,057 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:10:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:10:11,059 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:10:11,060 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:10:11,060 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:10:11,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-06-02 05:10:11,061 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of7ForFork0 was UNSAFE (3/9) [2021-06-02 05:10:11,061 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:10:11,075 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:10:11,075 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:10:11,075 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:10:11,075 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:10:11,075 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:10:11,075 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:10:11,075 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:10:11,075 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-02 05:11:02,085 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-02 05:11:02,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:11:02,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1442729874, now seen corresponding path program 1 times [2021-06-02 05:11:02,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:11:02,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499936002] [2021-06-02 05:11:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:11:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:11:02,089 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:11:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:11:02,090 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:11:02,092 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:11:02,092 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:11:02,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-06-02 05:11:02,092 INFO L301 ceAbstractionStarter]: Result for error location ULTIMATE.start was UNSAFE (4/9) [2021-06-02 05:11:02,093 WARN L243 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2021-06-02 05:11:02,093 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2021-06-02 05:11:02,112 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-02 05:11:02,113 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:11:02,134 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:11:02,134 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:11:02,134 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:11:02,134 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:11:02,134 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:11:02,134 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:11:02,134 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:11:02,134 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread3of8ForFork0======== [2021-06-02 05:11:02,329 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:11:02,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:11:02,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1741158915, now seen corresponding path program 1 times [2021-06-02 05:11:02,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:11:02,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898107189] [2021-06-02 05:11:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:11:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:11:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-02 05:11:02,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:11:02,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898107189] [2021-06-02 05:11:02,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898107189] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:11:02,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:11:02,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:11:02,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714930310] [2021-06-02 05:11:02,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:11:02,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:11:02,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:11:02,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:11:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:02,352 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:11:02,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:11:02,352 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:02,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:11:02,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-06-02 05:11:02,388 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:11:02,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:11:02,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1858648033, now seen corresponding path program 1 times [2021-06-02 05:11:02,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:11:02,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847468927] [2021-06-02 05:11:02,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:11:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:11:02,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-02 05:11:02,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:11:02,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847468927] [2021-06-02 05:11:02,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847468927] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:11:02,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:11:02,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:11:02,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438155809] [2021-06-02 05:11:02,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:11:02,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:11:02,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:11:02,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:11:02,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:02,411 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:11:02,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:11:02,411 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:11:02,411 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:11:02,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:11:02,459 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-06-02 05:11:02,459 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:11:02,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:11:02,459 INFO L82 PathProgramCache]: Analyzing trace with hash 545652365, now seen corresponding path program 1 times [2021-06-02 05:11:02,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:11:02,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474267387] [2021-06-02 05:11:02,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:11:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:11:02,465 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:11:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:11:02,468 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:11:02,474 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:11:02,474 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:11:02,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-06-02 05:11:02,475 INFO L301 ceAbstractionStarter]: Result for error location fooThread3of8ForFork0 was UNSAFE (1/10) [2021-06-02 05:11:02,476 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:11:02,488 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:11:02,488 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:11:02,488 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:11:02,488 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:11:02,488 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:11:02,488 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:11:02,488 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:11:02,488 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread4of8ForFork0======== [2021-06-02 05:11:02,727 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:11:02,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:11:02,727 INFO L82 PathProgramCache]: Analyzing trace with hash -279885295, now seen corresponding path program 1 times [2021-06-02 05:11:02,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:11:02,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997008094] [2021-06-02 05:11:02,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:11:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:11:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-02 05:11:02,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:11:02,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997008094] [2021-06-02 05:11:02,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997008094] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:11:02,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:11:02,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:11:02,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871357580] [2021-06-02 05:11:02,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:11:02,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:11:02,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:11:02,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:11:02,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:02,755 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:11:02,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:11:02,755 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:11:02,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-06-02 05:11:02,815 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:11:02,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:11:02,815 INFO L82 PathProgramCache]: Analyzing trace with hash -279884334, now seen corresponding path program 1 times [2021-06-02 05:11:02,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:11:02,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293923809] [2021-06-02 05:11:02,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:11:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:11:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-06-02 05:11:02,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:11:02,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293923809] [2021-06-02 05:11:02,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293923809] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:11:02,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:11:02,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:11:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776015105] [2021-06-02 05:11:02,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:11:02,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:11:02,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:11:02,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:11:02,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:02,832 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:11:02,833 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:11:02,833 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:11:02,833 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:11:02,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:11:02,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-06-02 05:11:02,888 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:11:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:11:02,888 INFO L82 PathProgramCache]: Analyzing trace with hash -86479432, now seen corresponding path program 1 times [2021-06-02 05:11:02,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:11:02,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492042808] [2021-06-02 05:11:02,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:11:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:11:02,891 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:11:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:11:02,892 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:11:02,893 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:11:02,893 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:11:02,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-06-02 05:11:02,894 INFO L301 ceAbstractionStarter]: Result for error location fooThread4of8ForFork0 was UNSAFE (2/10) [2021-06-02 05:11:02,894 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2021-06-02 05:11:02,931 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:11:02,931 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:11:02,932 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:11:02,932 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:11:02,932 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:11:02,932 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:11:02,932 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:11:02,932 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread2of8ForFork0======== Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:11:03,124 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:11:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:11:03,125 INFO L82 PathProgramCache]: Analyzing trace with hash 448702711, now seen corresponding path program 1 times [2021-06-02 05:11:03,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:11:03,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966706306] [2021-06-02 05:11:03,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:11:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:11:03,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-02 05:11:03,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:11:03,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966706306] [2021-06-02 05:11:03,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966706306] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:11:03,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:11:03,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-02 05:11:03,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551741361] [2021-06-02 05:11:03,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:11:03,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:11:03,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:11:03,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:11:03,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:03,142 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:11:03,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:11:03,142 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:11:03,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-06-02 05:11:03,165 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:11:03,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:11:03,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1024882983, now seen corresponding path program 1 times [2021-06-02 05:11:03,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:11:03,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400083368] [2021-06-02 05:11:03,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:11:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:11:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-02 05:11:03,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:11:03,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400083368] [2021-06-02 05:11:03,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400083368] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:11:03,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:11:03,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:11:03,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003068818] [2021-06-02 05:11:03,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:11:03,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:11:03,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:11:03,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:11:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:11:03,187 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:11:03,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:11:03,187 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:11:03,187 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:13:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:13:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:13:48,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-06-02 05:13:48,265 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:13:48,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:13:48,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1117784119, now seen corresponding path program 1 times [2021-06-02 05:13:48,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:13:48,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968613057] [2021-06-02 05:13:48,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:13:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:13:48,268 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:13:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:13:48,269 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:13:48,270 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:13:48,270 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:13:48,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-06-02 05:13:48,271 INFO L301 ceAbstractionStarter]: Result for error location fooThread2of8ForFork0 was UNSAFE (3/10) [2021-06-02 05:13:48,271 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:13:48,283 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:13:48,283 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:13:48,283 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:13:48,283 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:13:48,283 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:13:48,283 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:13:48,283 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:13:48,283 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread5of8ForFork0======== [2021-06-02 05:13:48,722 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:13:48,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:13:48,722 INFO L82 PathProgramCache]: Analyzing trace with hash 136807969, now seen corresponding path program 1 times [2021-06-02 05:13:48,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:13:48,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090678768] [2021-06-02 05:13:48,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:13:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:13:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-02 05:13:48,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:13:48,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090678768] [2021-06-02 05:13:48,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090678768] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:13:48,736 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:13:48,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:13:48,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506700839] [2021-06-02 05:13:48,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:13:48,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:13:48,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:13:48,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:13:48,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:13:48,737 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:13:48,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:13:48,737 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:13:48,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:13:48,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-06-02 05:13:48,937 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:13:48,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:13:48,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1024311650, now seen corresponding path program 1 times [2021-06-02 05:13:48,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:13:48,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165402931] [2021-06-02 05:13:48,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:13:48,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:13:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-06-02 05:13:48,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:13:48,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165402931] [2021-06-02 05:13:48,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165402931] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:13:48,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:13:48,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-02 05:13:48,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402185783] [2021-06-02 05:13:48,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:13:48,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:13:48,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:13:48,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:13:48,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:13:48,969 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:13:48,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:13:48,969 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:13:48,969 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:13:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:13:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:13:49,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-06-02 05:13:49,209 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:13:49,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:13:49,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1025235171, now seen corresponding path program 1 times [2021-06-02 05:13:49,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:13:49,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26879732] [2021-06-02 05:13:49,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:13:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:13:49,212 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:13:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:13:49,214 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:13:49,215 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:13:49,215 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:13:49,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-06-02 05:13:49,216 INFO L301 ceAbstractionStarter]: Result for error location fooThread5of8ForFork0 was UNSAFE (4/10) [2021-06-02 05:13:49,216 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:13:49,226 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:13:49,226 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:13:49,226 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:13:49,226 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:13:49,226 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:13:49,226 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:13:49,226 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:13:49,226 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread8of8ForFork0======== [2021-06-02 05:14:42,561 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:14:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:14:42,561 INFO L82 PathProgramCache]: Analyzing trace with hash -684641198, now seen corresponding path program 1 times [2021-06-02 05:14:42,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:14:42,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260859937] [2021-06-02 05:14:42,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:14:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:14:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-02 05:14:42,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:14:42,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260859937] [2021-06-02 05:14:42,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260859937] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:14:42,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:14:42,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:14:42,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638819031] [2021-06-02 05:14:42,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:14:42,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:14:42,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:14:42,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:14:42,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:14:42,585 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:14:42,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:14:42,585 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:15:09,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:15:09,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-06-02 05:15:09,924 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:15:09,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:15:09,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1802871635, now seen corresponding path program 1 times [2021-06-02 05:15:09,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:15:09,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56795926] [2021-06-02 05:15:09,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:15:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:15:09,952 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-06-02 05:15:09,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:15:09,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56795926] [2021-06-02 05:15:09,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56795926] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:15:09,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:15:09,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-02 05:15:09,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273870881] [2021-06-02 05:15:09,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:15:09,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:15:09,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:15:09,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:15:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:15:09,954 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:15:09,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:15:09,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:15:09,954 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:15:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:15:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:15:57,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-06-02 05:15:57,076 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:15:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:15:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1604591980, now seen corresponding path program 1 times [2021-06-02 05:15:57,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:15:57,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195268556] [2021-06-02 05:15:57,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:15:57,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:15:57,079 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:15:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:15:57,082 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:15:57,083 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:15:57,083 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:15:57,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-06-02 05:15:57,084 INFO L301 ceAbstractionStarter]: Result for error location fooThread8of8ForFork0 was UNSAFE (5/10) [2021-06-02 05:15:57,084 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:15:57,116 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:15:57,117 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:15:57,117 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:15:57,117 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:15:57,117 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:15:57,117 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:15:57,117 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:15:57,117 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == fooThread6of8ForFork0======== [2021-06-02 05:15:58,937 INFO L430 AbstractCegarLoop]: === Iteration 1 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:15:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:15:58,937 INFO L82 PathProgramCache]: Analyzing trace with hash -50217679, now seen corresponding path program 1 times [2021-06-02 05:15:58,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:15:58,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940586927] [2021-06-02 05:15:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:15:58,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:15:58,959 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-02 05:15:58,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:15:58,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940586927] [2021-06-02 05:15:58,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940586927] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:15:58,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:15:58,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-02 05:15:58,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432548094] [2021-06-02 05:15:58,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-02 05:15:58,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:15:58,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-02 05:15:58,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-02 05:15:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:15:58,960 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:15:58,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:15:58,960 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:16:00,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:16:00,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-06-02 05:16:00,006 INFO L430 AbstractCegarLoop]: === Iteration 2 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:16:00,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:16:00,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1857672142, now seen corresponding path program 1 times [2021-06-02 05:16:00,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:16:00,007 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053805512] [2021-06-02 05:16:00,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:16:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-02 05:16:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-06-02 05:16:00,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-02 05:16:00,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053805512] [2021-06-02 05:16:00,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053805512] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-02 05:16:00,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-02 05:16:00,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-02 05:16:00,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210712363] [2021-06-02 05:16:00,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-02 05:16:00,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-02 05:16:00,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-02 05:16:00,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-02 05:16:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:16:00,021 INFO L482 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2021-06-02 05:16:00,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-02 05:16:00,021 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:16:00,021 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2021-06-02 05:16:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-02 05:16:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-02 05:16:01,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-06-02 05:16:01,563 INFO L430 AbstractCegarLoop]: === Iteration 3 === [fooErr0ASSERT_VIOLATIONASSERT]=== [2021-06-02 05:16:01,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-02 05:16:01,563 INFO L82 PathProgramCache]: Analyzing trace with hash -970168461, now seen corresponding path program 1 times [2021-06-02 05:16:01,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-02 05:16:01,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815968287] [2021-06-02 05:16:01,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-02 05:16:01,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:16:01,566 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:16:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-02 05:16:01,567 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-02 05:16:01,569 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-02 05:16:01,569 INFO L655 BasicCegarLoop]: Counterexample might be feasible [2021-06-02 05:16:01,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-06-02 05:16:01,570 INFO L301 ceAbstractionStarter]: Result for error location fooThread6of8ForFork0 was UNSAFE (6/10) [2021-06-02 05:16:01,570 INFO L255 AbstractCegarLoop]: Starting to check reachability of 1 error locations. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2021-06-02 05:16:01,575 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-02 05:16:01,575 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-02 05:16:01,575 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-02 05:16:01,575 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-02 05:16:01,575 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-02 05:16:01,575 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-02 05:16:01,575 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-02 05:16:01,576 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == foo======== Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown