/usr/bin/java -Xmx8000000000 -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-NewStatesSleep-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_unsafe2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-44898dd [2022-02-09 08:19:23,640 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-09 08:19:23,642 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-09 08:19:23,675 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-09 08:19:23,714 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-NewStatesSleep-NoLbe.epf [2022-02-09 08:19:23,730 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-09 08:19:23,731 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-09 08:19:23,731 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-09 08:19:23,731 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-09 08:19:23,732 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-09 08:19:23,732 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-09 08:19:23,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-09 08:19:23,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-09 08:19:23,732 INFO L138 SettingsManager]: * Use SBE=true [2022-02-09 08:19:23,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-09 08:19:23,733 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-09 08:19:23,733 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-09 08:19:23,733 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-09 08:19:23,733 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-09 08:19:23,734 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-09 08:19:23,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-09 08:19:23,735 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-09 08:19:23,735 INFO L138 SettingsManager]: * Construct finite automaton lazily=true [2022-02-09 08:19:23,735 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-09 08:19:23,735 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-09 08:19:23,735 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-09 08:19:23,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-09 08:19:23,735 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-09 08:19:23,735 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-02-09 08:19:23,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-09 08:19:23,735 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2022-02-09 08:19:23,736 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-09 08:19:23,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-09 08:19:23,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-09 08:19:23,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-09 08:19:23,906 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-09 08:19:23,911 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-09 08:19:23,913 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe2.bpl [2022-02-09 08:19:23,913 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe2.bpl' [2022-02-09 08:19:23,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-09 08:19:23,936 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-09 08:19:23,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-09 08:19:23,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-09 08:19:23,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-09 08:19:23,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/1) ... [2022-02-09 08:19:23,951 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/1) ... [2022-02-09 08:19:23,961 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-09 08:19:23,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-09 08:19:23,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-09 08:19:23,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-09 08:19:23,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-09 08:19:23,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/1) ... [2022-02-09 08:19:23,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/1) ... [2022-02-09 08:19:23,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/1) ... [2022-02-09 08:19:23,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/1) ... [2022-02-09 08:19:23,970 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/1) ... [2022-02-09 08:19:23,972 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/1) ... [2022-02-09 08:19:23,973 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/1) ... [2022-02-09 08:19:23,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-09 08:19:23,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-09 08:19:23,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-09 08:19:23,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-09 08:19:23,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/1) ... [2022-02-09 08:19:23,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-09 08:19:23,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 08:19:23,999 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-09 08:19:24,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-09 08:19:24,033 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-09 08:19:24,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-09 08:19:24,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-09 08:19:24,033 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2022-02-09 08:19:24,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-02-09 08:19:24,034 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-02-09 08:19:24,034 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-09 08:19:24,065 INFO L234 CfgBuilder]: Building ICFG [2022-02-09 08:19:24,066 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-09 08:19:24,132 INFO L275 CfgBuilder]: Performing block encoding [2022-02-09 08:19:24,143 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-09 08:19:24,144 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-09 08:19:24,146 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 08:19:24 BoogieIcfgContainer [2022-02-09 08:19:24,146 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-09 08:19:24,149 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-09 08:19:24,151 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-09 08:19:24,154 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-09 08:19:24,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.02 08:19:23" (1/2) ... [2022-02-09 08:19:24,155 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64ef50f7 and model type fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.02 08:19:24, skipping insertion in model container [2022-02-09 08:19:24,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.02 08:19:24" (2/2) ... [2022-02-09 08:19:24,162 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe2.bpl [2022-02-09 08:19:24,166 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-09 08:19:24,166 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-09 08:19:24,166 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-09 08:19:24,166 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-09 08:19:24,199 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-09 08:19:24,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-02-09 08:19:24,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 08:19:24,241 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-02-09 08:19:24,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2022-02-09 08:19:24,278 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-09 08:19:24,291 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mLazyFiniteAutomaton=true, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-09 08:19:24,291 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-09 08:19:24,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-02-09 08:19:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 08:19:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash 39489028, now seen corresponding path program 1 times [2022-02-09 08:19:24,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 08:19:24,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854384005] [2022-02-09 08:19:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 08:19:24,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 08:19:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 08:19:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 08:19:24,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 08:19:24,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854384005] [2022-02-09 08:19:24,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854384005] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 08:19:24,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 08:19:24,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-09 08:19:24,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032846347] [2022-02-09 08:19:24,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 08:19:24,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 08:19:24,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 08:19:24,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 08:19:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-09 08:19:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-09 08:19:24,450 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-09 08:19:24,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-02-09 08:19:24,451 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-09 08:19:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-09 08:19:24,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-09 08:19:24,465 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-02-09 08:19:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 08:19:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1224221456, now seen corresponding path program 1 times [2022-02-09 08:19:24,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 08:19:24,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217546045] [2022-02-09 08:19:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 08:19:24,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 08:19:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-09 08:19:24,471 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-09 08:19:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-09 08:19:24,483 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-09 08:19:24,483 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-09 08:19:24,484 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 3 remaining) [2022-02-09 08:19:24,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 3 remaining) [2022-02-09 08:19:24,485 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 3 remaining) [2022-02-09 08:19:24,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-09 08:19:24,490 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-09 08:19:24,491 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-02-09 08:19:24,491 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-02-09 08:19:24,495 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-09 08:19:24,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-02-09 08:19:24,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 08:19:24,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-02-09 08:19:24,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (3)] Waiting until timeout for monitored process [2022-02-09 08:19:24,502 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-09 08:19:24,502 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mLazyFiniteAutomaton=true, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-09 08:19:24,503 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-09 08:19:24,505 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-02-09 08:19:24,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 08:19:24,506 INFO L85 PathProgramCache]: Analyzing trace with hash 52014157, now seen corresponding path program 1 times [2022-02-09 08:19:24,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 08:19:24,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341361411] [2022-02-09 08:19:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 08:19:24,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 08:19:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 08:19:24,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 08:19:24,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 08:19:24,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341361411] [2022-02-09 08:19:24,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341361411] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 08:19:24,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 08:19:24,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-09 08:19:24,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286673528] [2022-02-09 08:19:24,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 08:19:24,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 08:19:24,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 08:19:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 08:19:24,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-09 08:19:24,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-09 08:19:24,526 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-09 08:19:24,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-02-09 08:19:24,526 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-09 08:19:24,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-09 08:19:24,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-09 08:19:24,544 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-02-09 08:19:24,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 08:19:24,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1207555836, now seen corresponding path program 1 times [2022-02-09 08:19:24,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 08:19:24,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817059421] [2022-02-09 08:19:24,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 08:19:24,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 08:19:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 08:19:24,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 08:19:24,581 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 08:19:24,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817059421] [2022-02-09 08:19:24,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817059421] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 08:19:24,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590283665] [2022-02-09 08:19:24,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 08:19:24,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 08:19:24,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 08:19:24,620 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-09 08:19:24,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-09 08:19:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 08:19:24,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-09 08:19:24,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 08:19:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 08:19:24,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 08:19:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 08:19:24,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590283665] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 08:19:24,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 08:19:24,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-02-09 08:19:24,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790668329] [2022-02-09 08:19:24,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 08:19:24,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-09 08:19:24,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 08:19:24,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-09 08:19:24,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-09 08:19:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-09 08:19:24,783 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-09 08:19:24,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) 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) [2022-02-09 08:19:24,783 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2022-02-09 08:19:24,783 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-09 08:19:24,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-09 08:19:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 08:19:24,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-09 08:19:25,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 08:19:25,020 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-02-09 08:19:25,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 08:19:25,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1220655517, now seen corresponding path program 1 times [2022-02-09 08:19:25,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 08:19:25,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661123167] [2022-02-09 08:19:25,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 08:19:25,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 08:19:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-09 08:19:25,026 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-09 08:19:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-09 08:19:25,030 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-09 08:19:25,030 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-09 08:19:25,030 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 4 remaining) [2022-02-09 08:19:25,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2022-02-09 08:19:25,030 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2022-02-09 08:19:25,031 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2022-02-09 08:19:25,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-09 08:19:25,033 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-09 08:19:25,033 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-02-09 08:19:25,033 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-02-09 08:19:25,038 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-09 08:19:25,040 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-02-09 08:19:25,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 08:19:25,041 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-02-09 08:19:25,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (5)] Waiting until timeout for monitored process [2022-02-09 08:19:25,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-09 08:19:25,047 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PARTIAL_ORDER_FA, mLazyFiniteAutomaton=true, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-09 08:19:25,047 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-02-09 08:19:25,050 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 1 more)] === [2022-02-09 08:19:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 08:19:25,050 INFO L85 PathProgramCache]: Analyzing trace with hash 69311067, now seen corresponding path program 1 times [2022-02-09 08:19:25,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 08:19:25,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269124750] [2022-02-09 08:19:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 08:19:25,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 08:19:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 08:19:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 08:19:25,074 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 08:19:25,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269124750] [2022-02-09 08:19:25,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269124750] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-09 08:19:25,075 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-09 08:19:25,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-09 08:19:25,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712582270] [2022-02-09 08:19:25,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-09 08:19:25,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-09 08:19:25,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 08:19:25,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-09 08:19:25,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-09 08:19:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-09 08:19:25,076 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-09 08:19:25,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-02-09 08:19:25,077 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-09 08:19:25,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-09 08:19:25,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-09 08:19:25,107 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 1 more)] === [2022-02-09 08:19:25,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 08:19:25,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1620541418, now seen corresponding path program 1 times [2022-02-09 08:19:25,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 08:19:25,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74896977] [2022-02-09 08:19:25,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 08:19:25,108 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 08:19:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 08:19:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 08:19:25,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-09 08:19:25,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74896977] [2022-02-09 08:19:25,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74896977] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-09 08:19:25,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100096448] [2022-02-09 08:19:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 08:19:25,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 08:19:25,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-09 08:19:25,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-09 08:19:25,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-09 08:19:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-09 08:19:25,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-09 08:19:25,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-09 08:19:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 08:19:25,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-09 08:19:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-09 08:19:25,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100096448] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-09 08:19:25,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-09 08:19:25,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-02-09 08:19:25,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247445921] [2022-02-09 08:19:25,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-09 08:19:25,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-09 08:19:25,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-09 08:19:25,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-09 08:19:25,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-09 08:19:25,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-02-09 08:19:25,232 INFO L470 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-02-09 08:19:25,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) 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) [2022-02-09 08:19:25,232 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 4 states. [2022-02-09 08:19:25,232 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states. [2022-02-09 08:19:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-09 08:19:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-09 08:19:25,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-09 08:19:25,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-09 08:19:25,496 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 1 more)] === [2022-02-09 08:19:25,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-09 08:19:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash -110651604, now seen corresponding path program 1 times [2022-02-09 08:19:25,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-09 08:19:25,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484713027] [2022-02-09 08:19:25,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-09 08:19:25,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-09 08:19:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-09 08:19:25,502 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-09 08:19:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-09 08:19:25,507 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-09 08:19:25,508 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-09 08:19:25,508 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location threadErr0ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2022-02-09 08:19:25,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 5 remaining) [2022-02-09 08:19:25,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 5 remaining) [2022-02-09 08:19:25,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 5 remaining) [2022-02-09 08:19:25,508 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2022-02-09 08:19:25,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-09 08:19:25,509 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-09 08:19:25,512 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 3 thread instances [2022-02-09 08:19:25,512 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-09 08:19:25,520 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.02 08:19:25 BasicIcfg [2022-02-09 08:19:25,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-09 08:19:25,521 INFO L158 Benchmark]: Toolchain (without parser) took 1584.66ms. Allocated memory was 220.2MB in the beginning and 277.9MB in the end (delta: 57.7MB). Free memory was 185.1MB in the beginning and 229.8MB in the end (delta: -44.7MB). Peak memory consumption was 14.4MB. Max. memory is 8.0GB. [2022-02-09 08:19:25,521 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 220.2MB. Free memory is still 186.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-09 08:19:25,521 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.31ms. Allocated memory is still 220.2MB. Free memory was 185.1MB in the beginning and 183.5MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-02-09 08:19:25,521 INFO L158 Benchmark]: Boogie Preprocessor took 10.21ms. Allocated memory is still 220.2MB. Free memory was 183.5MB in the beginning and 182.6MB in the end (delta: 879.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-09 08:19:25,522 INFO L158 Benchmark]: RCFGBuilder took 172.59ms. Allocated memory is still 220.2MB. Free memory was 182.6MB in the beginning and 174.6MB in the end (delta: 8.1MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-02-09 08:19:25,522 INFO L158 Benchmark]: TraceAbstraction took 1370.87ms. Allocated memory was 220.2MB in the beginning and 277.9MB in the end (delta: 57.7MB). Free memory was 174.1MB in the beginning and 229.8MB in the end (delta: -55.7MB). Peak memory consumption was 1.8MB. Max. memory is 8.0GB. [2022-02-09 08:19:25,523 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 220.2MB. Free memory is still 186.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.31ms. Allocated memory is still 220.2MB. Free memory was 185.1MB in the beginning and 183.5MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.21ms. Allocated memory is still 220.2MB. Free memory was 183.5MB in the beginning and 182.6MB in the end (delta: 879.6kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 172.59ms. Allocated memory is still 220.2MB. Free memory was 182.6MB in the beginning and 174.6MB in the end (delta: 8.1MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 1370.87ms. Allocated memory was 220.2MB in the beginning and 277.9MB in the end (delta: 57.7MB). Free memory was 174.1MB in the beginning and 229.8MB in the end (delta: -55.7MB). Peak memory consumption was 1.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 16, positive: 10, positive conditional: 10, positive unconditional: 0, negative: 6, negative conditional: 6, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 10, positive: 10, positive conditional: 10, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 10, positive: 10, positive conditional: 10, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 10, positive: 10, positive conditional: 8, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 10, positive: 10, positive conditional: 6, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 10, positive: 10, positive conditional: 6, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 4, positive unconditional: 4, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 10, positive: 2, positive conditional: 2, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 8, unknown conditional: 4, unknown unconditional: 4] , Statistics on independence cache: Total cache size (in pairs): 8, Positive cache size: 8, Positive conditional cache size: 4, Positive unconditional cache size: 4, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Eliminated conditions: 2, Maximal queried relation: 0, Independence queries for same thread: 6 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 46, positive: 28, positive conditional: 28, positive unconditional: 0, negative: 18, negative conditional: 18, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 28, positive: 28, positive conditional: 28, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 28, positive: 28, positive conditional: 28, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 28, positive: 28, positive conditional: 26, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 28, positive: 28, positive conditional: 20, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 28, positive: 28, positive conditional: 20, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 22, positive: 22, positive conditional: 16, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 22, positive: 22, positive conditional: 0, positive unconditional: 22, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 28, positive: 6, positive conditional: 4, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 22, unknown conditional: 16, unknown unconditional: 6] , Statistics on independence cache: Total cache size (in pairs): 22, Positive cache size: 22, Positive conditional cache size: 16, Positive unconditional cache size: 6, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Eliminated conditions: 6, Maximal queried relation: 0, Independence queries for same thread: 18 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 49, positive: 30, positive conditional: 30, positive unconditional: 0, negative: 19, negative conditional: 19, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 30, positive: 30, positive conditional: 30, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: DisjunctiveConditionalIndependenceRelation.Independence Queries: [ total: 30, positive: 30, positive conditional: 30, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , DisjunctiveConditionalIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 30, positive: 30, positive conditional: 28, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SemanticConditionEliminator.Independence Queries: [ total: 30, positive: 30, positive conditional: 22, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticConditionEliminator.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 30, positive: 30, positive conditional: 22, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 18, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 30, positive: 6, positive conditional: 4, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 24, unknown conditional: 18, unknown unconditional: 6] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 18, Positive unconditional cache size: 6, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Eliminated conditions: 6, Maximal queried relation: 0, Independence queries for same thread: 19 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 17]: assertion can be violated assertion can be violated We found a FailurePath: [L23] 0 x := 0; VAL [x=0] [L26] FORK 0 fork 0 thread(); VAL [x=0] [L16] 1 x := x + 1; VAL [x=1] [L17] 1 assert x < 3; VAL [x=1] [L26] FORK 0 fork 0 thread(); VAL [x=1] [L16] 2 x := x + 1; VAL [x=2] [L17] 2 assert x < 3; VAL [x=2] [L26] FORK 0 fork 0 thread(); VAL [x=2] [L16] 3 x := x + 1; VAL [x=3] [L17] 3 assert x < 3; VAL [x=3] - UnprovableResult [Line: 25]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 14 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 12 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 1/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 19 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 84 SizeOfPredicates, 0 NumberOfNonLiveVariables, 16 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 4/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 24 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 0, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.1s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=0occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 28 ConstructedInterpolants, 0 QuantifiedInterpolants, 84 SizeOfPredicates, 0 NumberOfNonLiveVariables, 16 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 4/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-09 08:19:25,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (5)] Ended with exit code 0 [2022-02-09 08:19:25,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (3)] Ended with exit code 0 [2022-02-09 08:19:25,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Forceful destruction successful, exit code 0 [2022-02-09 08:19:26,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...