/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-MCRwithDepranks-BasicCegarLoop.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 [2022-02-16 13:25:57,197 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-16 13:25:57,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-16 13:25:57,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-16 13:25:57,326 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-MCRwithDepranks-BasicCegarLoop.epf [2022-02-16 13:25:57,362 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-16 13:25:57,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-16 13:25:57,363 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-16 13:25:57,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-16 13:25:57,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-16 13:25:57,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-16 13:25:57,364 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-16 13:25:57,364 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-16 13:25:57,365 INFO L138 SettingsManager]: * Use SBE=true [2022-02-16 13:25:57,365 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-16 13:25:57,365 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-16 13:25:57,365 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-16 13:25:57,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-16 13:25:57,366 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-16 13:25:57,379 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-16 13:25:57,379 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:25:57,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-16 13:25:57,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-16 13:25:57,380 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-16 13:25:57,380 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-16 13:25:57,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-16 13:25:57,380 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-16 13:25:57,380 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-16 13:25:57,380 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=MCR_WITH_DEPRANKS [2022-02-16 13:25:57,380 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-16 13:25:57,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-16 13:25:57,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-16 13:25:57,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-16 13:25:57,683 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-16 13:25:57,684 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-16 13:25:57,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe2.bpl [2022-02-16 13:25:57,685 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe2.bpl' [2022-02-16 13:25:57,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-16 13:25:57,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-16 13:25:57,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-16 13:25:57,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-16 13:25:57,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-16 13:25:57,722 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 16.02 01:25:57" (1/1) ... [2022-02-16 13:25:57,727 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 16.02 01:25:57" (1/1) ... [2022-02-16 13:25:57,732 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-16 13:25:57,733 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-16 13:25:57,734 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-16 13:25:57,734 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-16 13:25:57,734 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-16 13:25:57,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:57" (1/1) ... [2022-02-16 13:25:57,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:57" (1/1) ... [2022-02-16 13:25:57,740 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:57" (1/1) ... [2022-02-16 13:25:57,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:57" (1/1) ... [2022-02-16 13:25:57,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:57" (1/1) ... [2022-02-16 13:25:57,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:57" (1/1) ... [2022-02-16 13:25:57,743 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:57" (1/1) ... [2022-02-16 13:25:57,743 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-16 13:25:57,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-16 13:25:57,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-16 13:25:57,744 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-16 13:25:57,745 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:57" (1/1) ... [2022-02-16 13:25:57,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-16 13:25:57,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-16 13:25:57,788 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) [2022-02-16 13:25:57,804 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 [2022-02-16 13:25:57,844 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-16 13:25:57,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-16 13:25:57,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-16 13:25:57,844 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2022-02-16 13:25:57,844 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-02-16 13:25:57,844 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-02-16 13:25:57,845 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-16 13:25:57,875 INFO L234 CfgBuilder]: Building ICFG [2022-02-16 13:25:57,876 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-16 13:25:57,950 INFO L275 CfgBuilder]: Performing block encoding [2022-02-16 13:25:57,955 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-16 13:25:57,955 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-16 13:25:57,956 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:25:57 BoogieIcfgContainer [2022-02-16 13:25:57,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-16 13:25:57,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-16 13:25:57,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-16 13:25:57,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-16 13:25:57,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 16.02 01:25:57" (1/2) ... [2022-02-16 13:25:57,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39591cb and model type fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:25:57, skipping insertion in model container [2022-02-16 13:25:57,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:25:57" (2/2) ... [2022-02-16 13:25:57,979 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe2.bpl [2022-02-16 13:25:57,984 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-16 13:25:57,985 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-16 13:25:57,985 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-16 13:25:57,985 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-16 13:25:58,010 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-16 13:25:58,039 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:25:58,044 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=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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 [2022-02-16 13:25:58,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-02-16 13:25:58,050 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 8 transitions, 21 flow [2022-02-16 13:25:58,060 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 14 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) [2022-02-16 13:25:58,085 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 20 transitions and produced 15 states. [2022-02-16 13:25:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 14 states have internal predecessors, (14), 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) [2022-02-16 13:25:58,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-02-16 13:25:58,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:58,111 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2022-02-16 13:25:58,111 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-02-16 13:25:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash 41097, now seen corresponding path program 1 times [2022-02-16 13:25:58,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:58,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296408376] [2022-02-16 13:25:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:58,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:58,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-16 13:25:58,197 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-16 13:25:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-16 13:25:58,216 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-16 13:25:58,217 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-16 13:25:58,218 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 3 remaining) [2022-02-16 13:25:58,219 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 3 remaining) [2022-02-16 13:25:58,220 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 3 remaining) [2022-02-16 13:25:58,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-16 13:25:58,222 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-02-16 13:25:58,223 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-02-16 13:25:58,223 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-02-16 13:25:58,246 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-16 13:25:58,254 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:25:58,256 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=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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 [2022-02-16 13:25:58,256 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-16 13:25:58,258 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 13 transitions, 38 flow [2022-02-16 13:25:58,283 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 81 states, 73 states have (on average 2.3835616438356166) internal successors, (174), 80 states have internal predecessors, (174), 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) [2022-02-16 13:25:58,344 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 319 transitions and produced 157 states. [2022-02-16 13:25:58,346 INFO L276 IsEmpty]: Start isEmpty. Operand has 157 states, 88 states have (on average 1.9772727272727273) internal successors, (174), 156 states have internal predecessors, (174), 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) [2022-02-16 13:25:58,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-02-16 13:25:58,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:58,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-02-16 13:25:58,347 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-02-16 13:25:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:58,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1678255, now seen corresponding path program 1 times [2022-02-16 13:25:58,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:58,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629786216] [2022-02-16 13:25:58,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:58,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-16 13:25:58,352 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-16 13:25:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-16 13:25:58,354 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-16 13:25:58,354 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-16 13:25:58,354 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 4 remaining) [2022-02-16 13:25:58,355 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2022-02-16 13:25:58,355 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2022-02-16 13:25:58,355 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2022-02-16 13:25:58,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-16 13:25:58,355 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-02-16 13:25:58,356 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-02-16 13:25:58,356 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-02-16 13:25:58,378 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-16 13:25:58,394 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:25:58,395 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=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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 [2022-02-16 13:25:58,395 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-02-16 13:25:58,396 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 18 transitions, 57 flow [2022-02-16 13:25:58,421 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 423 states, 404 states have (on average 3.099009900990099) internal successors, (1252), 422 states have internal predecessors, (1252), 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) [2022-02-16 13:25:58,597 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 11025 transitions and produced 4554 states. [2022-02-16 13:25:58,613 INFO L276 IsEmpty]: Start isEmpty. Operand has 4554 states, 2484 states have (on average 2.1211755233494363) internal successors, (5269), 4553 states have internal predecessors, (5269), 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) [2022-02-16 13:25:58,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-02-16 13:25:58,614 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:58,614 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-02-16 13:25:58,614 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 1 more)] === [2022-02-16 13:25:58,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:58,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2236150, now seen corresponding path program 1 times [2022-02-16 13:25:58,615 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:58,615 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884882124] [2022-02-16 13:25:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:58,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:25:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:25:58,672 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:25:58,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884882124] [2022-02-16 13:25:58,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884882124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:25:58,673 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:25:58,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-16 13:25:58,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488018226] [2022-02-16 13:25:58,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:25:58,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:25:58,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:25:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:25:58,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:25:58,760 INFO L87 Difference]: Start difference. First operand has 4554 states, 2484 states have (on average 2.1211755233494363) internal successors, (5269), 4553 states have internal predecessors, (5269), 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) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-02-16 13:25:58,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:25:58,919 INFO L93 Difference]: Finished difference Result 4250 states and 4885 transitions. [2022-02-16 13:25:58,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:25:58,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) Word has length 4 [2022-02-16 13:25:58,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:25:58,954 INFO L225 Difference]: With dead ends: 4250 [2022-02-16 13:25:58,954 INFO L226 Difference]: Without dead ends: 4191 [2022-02-16 13:25:58,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:25:58,959 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:25:58,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:25:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2022-02-16 13:25:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 573. [2022-02-16 13:25:59,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 423 states have (on average 2.3900709219858154) internal successors, (1011), 572 states have internal predecessors, (1011), 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) [2022-02-16 13:25:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1011 transitions. [2022-02-16 13:25:59,076 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1011 transitions. Word has length 4 [2022-02-16 13:25:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:25:59,076 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1011 transitions. [2022-02-16 13:25:59,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-02-16 13:25:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1011 transitions. [2022-02-16 13:25:59,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-02-16 13:25:59,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:25:59,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-02-16 13:25:59,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-16 13:25:59,078 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 1 more)] === [2022-02-16 13:25:59,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:25:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash 69326663, now seen corresponding path program 1 times [2022-02-16 13:25:59,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:25:59,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523442860] [2022-02-16 13:25:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:25:59,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:25:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-16 13:25:59,092 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-16 13:25:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-16 13:25:59,095 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-16 13:25:59,095 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-16 13:25:59,096 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (4 of 5 remaining) [2022-02-16 13:25:59,096 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2022-02-16 13:25:59,096 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 5 remaining) [2022-02-16 13:25:59,096 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 5 remaining) [2022-02-16 13:25:59,096 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2022-02-16 13:25:59,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-16 13:25:59,097 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-16 13:25:59,097 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-02-16 13:25:59,097 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-02-16 13:25:59,122 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-16 13:25:59,123 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:25:59,123 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=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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 [2022-02-16 13:25:59,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-02-16 13:25:59,124 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 78 flow [2022-02-16 13:25:59,198 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2157 states, 2115 states have (on average 3.8401891252955083) internal successors, (8122), 2156 states have internal predecessors, (8122), 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) [2022-02-16 13:26:02,397 INFO L104 alCausalityReduction]: MaximalCausalityReduction evaluated 389465 transitions and produced 126933 states. [2022-02-16 13:26:02,804 INFO L276 IsEmpty]: Start isEmpty. Operand has 126933 states, 68063 states have (on average 2.352129644593979) internal successors, (160093), 126932 states have internal predecessors, (160093), 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) [2022-02-16 13:26:02,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-02-16 13:26:02,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:26:02,805 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-02-16 13:26:02,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 2 more)] === [2022-02-16 13:26:02,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:26:02,806 INFO L85 PathProgramCache]: Analyzing trace with hash 2947898, now seen corresponding path program 1 times [2022-02-16 13:26:02,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:26:02,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621786393] [2022-02-16 13:26:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:26:02,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:26:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:26:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-16 13:26:02,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:26:02,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621786393] [2022-02-16 13:26:02,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621786393] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:26:02,836 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:26:02,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-02-16 13:26:02,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819995087] [2022-02-16 13:26:02,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:26:02,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-16 13:26:02,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:26:02,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-16 13:26:02,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:26:03,293 INFO L87 Difference]: Start difference. First operand has 126933 states, 68063 states have (on average 2.352129644593979) internal successors, (160093), 126932 states have internal predecessors, (160093), 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) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-02-16 13:26:04,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:26:04,790 INFO L93 Difference]: Finished difference Result 121025 states and 152013 transitions. [2022-02-16 13:26:04,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-16 13:26:04,791 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) Word has length 4 [2022-02-16 13:26:04,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:26:05,621 INFO L225 Difference]: With dead ends: 121025 [2022-02-16 13:26:05,621 INFO L226 Difference]: Without dead ends: 117782 [2022-02-16 13:26:05,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-16 13:26:05,623 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:26:05,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 23 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:26:05,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117782 states. [2022-02-16 13:26:06,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117782 to 2899. [2022-02-16 13:26:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2899 states, 2143 states have (on average 2.877274848343444) internal successors, (6166), 2898 states have internal predecessors, (6166), 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) [2022-02-16 13:26:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2899 states to 2899 states and 6166 transitions. [2022-02-16 13:26:06,811 INFO L78 Accepts]: Start accepts. Automaton has 2899 states and 6166 transitions. Word has length 4 [2022-02-16 13:26:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:26:06,811 INFO L470 AbstractCegarLoop]: Abstraction has 2899 states and 6166 transitions. [2022-02-16 13:26:06,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-02-16 13:26:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2899 states and 6166 transitions. [2022-02-16 13:26:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-02-16 13:26:06,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:26:06,813 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-02-16 13:26:06,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-16 13:26:06,813 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 2 more)] === [2022-02-16 13:26:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:26:06,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1461614924, now seen corresponding path program 1 times [2022-02-16 13:26:06,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:26:06,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839617487] [2022-02-16 13:26:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:26:06,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:26:06,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-16 13:26:06,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-16 13:26:06,859 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-16 13:26:06,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839617487] [2022-02-16 13:26:06,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839617487] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-16 13:26:06,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-16 13:26:06,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-16 13:26:06,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924738125] [2022-02-16 13:26:06,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-16 13:26:06,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-16 13:26:06,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-16 13:26:06,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-16 13:26:06,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:26:06,861 INFO L87 Difference]: Start difference. First operand 2899 states and 6166 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-02-16 13:26:06,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-16 13:26:06,944 INFO L93 Difference]: Finished difference Result 3991 states and 7041 transitions. [2022-02-16 13:26:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-16 13:26:06,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) Word has length 6 [2022-02-16 13:26:06,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-16 13:26:06,964 INFO L225 Difference]: With dead ends: 3991 [2022-02-16 13:26:06,964 INFO L226 Difference]: Without dead ends: 3859 [2022-02-16 13:26:06,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-16 13:26:06,967 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-16 13:26:06,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 28 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-16 13:26:06,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2022-02-16 13:26:07,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 2955. [2022-02-16 13:26:07,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2955 states, 2250 states have (on average 2.72) internal successors, (6120), 2954 states have internal predecessors, (6120), 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) [2022-02-16 13:26:07,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2955 states to 2955 states and 6120 transitions. [2022-02-16 13:26:07,193 INFO L78 Accepts]: Start accepts. Automaton has 2955 states and 6120 transitions. Word has length 6 [2022-02-16 13:26:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-16 13:26:07,193 INFO L470 AbstractCegarLoop]: Abstraction has 2955 states and 6120 transitions. [2022-02-16 13:26:07,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2022-02-16 13:26:07,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2955 states and 6120 transitions. [2022-02-16 13:26:07,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-02-16 13:26:07,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-16 13:26:07,196 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-02-16 13:26:07,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-16 13:26:07,196 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 2 more)] === [2022-02-16 13:26:07,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-16 13:26:07,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1461603850, now seen corresponding path program 1 times [2022-02-16 13:26:07,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-16 13:26:07,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270315070] [2022-02-16 13:26:07,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-16 13:26:07,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-16 13:26:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-16 13:26:07,202 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-16 13:26:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-16 13:26:07,206 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-02-16 13:26:07,206 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-16 13:26:07,206 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (5 of 6 remaining) [2022-02-16 13:26:07,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2022-02-16 13:26:07,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (3 of 6 remaining) [2022-02-16 13:26:07,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 6 remaining) [2022-02-16 13:26:07,206 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2022-02-16 13:26:07,207 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2022-02-16 13:26:07,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-16 13:26:07,207 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-02-16 13:26:07,207 WARN L235 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-02-16 13:26:07,207 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-02-16 13:26:07,218 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-02-16 13:26:07,219 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-16 13:26:07,219 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=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, 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 [2022-02-16 13:26:07,220 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-02-16 13:26:07,220 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 28 transitions, 101 flow [2022-02-16 13:26:07,538 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 10875 states, 10786 states have (on average 4.605970702762841) internal successors, (49680), 10874 states have internal predecessors, (49680), 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)