/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_unsafe2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 03:48:28,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 03:48:28,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 03:48:28,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 03:48:28,506 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-FA-NoLbe.epf [2022-01-18 03:48:28,522 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 03:48:28,522 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 03:48:28,522 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 03:48:28,522 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 03:48:28,523 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 03:48:28,523 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 03:48:28,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 03:48:28,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 03:48:28,524 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 03:48:28,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 03:48:28,524 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 03:48:28,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 03:48:28,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 03:48:28,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 03:48:28,524 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 03:48:28,524 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 03:48:28,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 03:48:28,525 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 03:48:28,525 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 03:48:28,525 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 03:48:28,525 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 03:48:28,525 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 03:48:28,525 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 03:48:28,525 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 03:48:28,526 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 03:48:28,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 03:48:28,526 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 03:48:28,526 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 03:48:28,526 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 03:48:28,526 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 03:48:28,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 03:48:28,527 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 03:48:28,527 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 03:48:28,527 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 03:48:28,728 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 03:48:28,744 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 03:48:28,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 03:48:28,751 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 03:48:28,751 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 03:48:28,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe2.bpl [2022-01-18 03:48:28,753 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe2.bpl' [2022-01-18 03:48:28,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 03:48:28,771 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 03:48:28,772 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 03:48:28,772 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 03:48:28,772 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 03:48:28,783 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 18.01 03:48:28" (1/1) ... [2022-01-18 03:48:28,788 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 18.01 03:48:28" (1/1) ... [2022-01-18 03:48:28,802 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 03:48:28,804 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 03:48:28,806 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 03:48:28,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 03:48:28,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 03:48:28,812 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:48:28" (1/1) ... [2022-01-18 03:48:28,812 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:48:28" (1/1) ... [2022-01-18 03:48:28,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:48:28" (1/1) ... [2022-01-18 03:48:28,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:48:28" (1/1) ... [2022-01-18 03:48:28,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:48:28" (1/1) ... [2022-01-18 03:48:28,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:48:28" (1/1) ... [2022-01-18 03:48:28,818 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:48:28" (1/1) ... [2022-01-18 03:48:28,820 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 03:48:28,821 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 03:48:28,821 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 03:48:28,821 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 03:48:28,822 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:48:28" (1/1) ... [2022-01-18 03:48:28,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 03:48:28,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 03:48:28,857 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) [2022-01-18 03:48:28,882 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 [2022-01-18 03:48:28,900 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 03:48:28,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 03:48:28,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 03:48:28,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2022-01-18 03:48:28,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2022-01-18 03:48:28,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2022-01-18 03:48:28,902 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 03:48:28,944 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 03:48:28,945 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 03:48:29,000 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 03:48:29,005 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 03:48:29,005 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-18 03:48:29,007 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:48:29 BoogieIcfgContainer [2022-01-18 03:48:29,007 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 03:48:29,009 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 03:48:29,009 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 03:48:29,011 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 03:48:29,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:48:28" (1/2) ... [2022-01-18 03:48:29,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234bf962 and model type fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:48:29, skipping insertion in model container [2022-01-18 03:48:29,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:48:29" (2/2) ... [2022-01-18 03:48:29,013 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe2.bpl [2022-01-18 03:48:29,017 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 03:48:29,017 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 03:48:29,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 03:48:29,018 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 03:48:29,035 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:48:29,070 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:48:29,075 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, 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 [2022-01-18 03:48:29,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 03:48:29,082 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 11 places, 8 transitions, 21 flow [2022-01-18 03:48:29,093 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) [2022-01-18 03:48:29,095 INFO L276 IsEmpty]: Start isEmpty. Operand 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) [2022-01-18 03:48:29,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-01-18 03:48:29,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:29,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2022-01-18 03:48:29,100 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-01-18 03:48:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:29,109 INFO L85 PathProgramCache]: Analyzing trace with hash 41097, now seen corresponding path program 1 times [2022-01-18 03:48:29,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:29,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885091207] [2022-01-18 03:48:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:29,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:29,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:29,177 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:48:29,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:29,188 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:48:29,190 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:48:29,190 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 3 remaining) [2022-01-18 03:48:29,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 3 remaining) [2022-01-18 03:48:29,192 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 3 remaining) [2022-01-18 03:48:29,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 03:48:29,195 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-18 03:48:29,200 WARN L234 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:48:29,200 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-01-18 03:48:29,207 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:48:29,209 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:48:29,211 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, 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 [2022-01-18 03:48:29,211 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 03:48:29,212 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 13 transitions, 38 flow [2022-01-18 03:48:29,223 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) [2022-01-18 03:48:29,224 INFO L276 IsEmpty]: Start isEmpty. Operand 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) [2022-01-18 03:48:29,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:48:29,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:29,225 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:48:29,225 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT] === [2022-01-18 03:48:29,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:29,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1678255, now seen corresponding path program 1 times [2022-01-18 03:48:29,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:29,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413539669] [2022-01-18 03:48:29,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:29,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:29,230 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:48:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:29,234 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:48:29,234 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:48:29,234 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (3 of 4 remaining) [2022-01-18 03:48:29,235 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 4 remaining) [2022-01-18 03:48:29,235 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2022-01-18 03:48:29,235 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 4 remaining) [2022-01-18 03:48:29,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 03:48:29,236 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-01-18 03:48:29,236 WARN L234 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:48:29,236 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-01-18 03:48:29,243 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:48:29,245 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:48:29,246 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, 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 [2022-01-18 03:48:29,246 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-18 03:48:29,247 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 18 transitions, 57 flow [2022-01-18 03:48:29,297 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) [2022-01-18 03:48:29,299 INFO L276 IsEmpty]: Start isEmpty. Operand 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) [2022-01-18 03:48:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:48:29,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:29,300 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:48:29,300 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 1 more)] === [2022-01-18 03:48:29,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:29,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2236150, now seen corresponding path program 1 times [2022-01-18 03:48:29,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:29,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732406427] [2022-01-18 03:48:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:29,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:29,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:48:29,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:29,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:48:29,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732406427] [2022-01-18 03:48:29,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732406427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:48:29,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:48:29,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 03:48:29,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855615870] [2022-01-18 03:48:29,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:48:29,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 03:48:29,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:48:29,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 03:48:29,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:48:29,382 INFO L87 Difference]: Start difference. First operand 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) 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) [2022-01-18 03:48:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:48:29,504 INFO L93 Difference]: Finished difference Result 408 states and 1203 transitions. [2022-01-18 03:48:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 03:48:29,506 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 [2022-01-18 03:48:29,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:48:29,518 INFO L225 Difference]: With dead ends: 408 [2022-01-18 03:48:29,519 INFO L226 Difference]: Without dead ends: 406 [2022-01-18 03:48:29,519 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 [2022-01-18 03:48:29,522 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 03:48:29,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 03:48:29,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-18 03:48:29,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 406. [2022-01-18 03:48:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 388 states have (on average 3.0927835051546393) internal successors, (1200), 405 states have internal predecessors, (1200), 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) [2022-01-18 03:48:29,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1200 transitions. [2022-01-18 03:48:29,627 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1200 transitions. Word has length 4 [2022-01-18 03:48:29,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:48:29,629 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1200 transitions. [2022-01-18 03:48:29,629 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) [2022-01-18 03:48:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1200 transitions. [2022-01-18 03:48:29,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-01-18 03:48:29,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:29,630 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-01-18 03:48:29,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 03:48:29,630 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 1 more)] === [2022-01-18 03:48:29,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:29,631 INFO L85 PathProgramCache]: Analyzing trace with hash 69326663, now seen corresponding path program 1 times [2022-01-18 03:48:29,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:29,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608816024] [2022-01-18 03:48:29,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:29,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:29,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:29,637 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:48:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:29,641 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:48:29,641 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:48:29,642 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (4 of 5 remaining) [2022-01-18 03:48:29,642 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (3 of 5 remaining) [2022-01-18 03:48:29,642 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 5 remaining) [2022-01-18 03:48:29,643 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 5 remaining) [2022-01-18 03:48:29,643 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 5 remaining) [2022-01-18 03:48:29,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 03:48:29,643 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-18 03:48:29,644 WARN L234 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:48:29,644 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-01-18 03:48:29,652 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:48:29,654 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:48:29,655 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, 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 [2022-01-18 03:48:29,655 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-01-18 03:48:29,656 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 78 flow [2022-01-18 03:48:29,742 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) [2022-01-18 03:48:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 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) [2022-01-18 03:48:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:48:29,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:29,749 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:48:29,749 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 2 more)] === [2022-01-18 03:48:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash 2947898, now seen corresponding path program 1 times [2022-01-18 03:48:29,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:29,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772186305] [2022-01-18 03:48:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:29,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:48:29,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:29,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:48:29,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772186305] [2022-01-18 03:48:29,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772186305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:48:29,773 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:48:29,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 03:48:29,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275067563] [2022-01-18 03:48:29,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:48:29,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 03:48:29,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:48:29,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 03:48:29,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:48:29,781 INFO L87 Difference]: Start difference. First operand 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) 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) [2022-01-18 03:48:29,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:48:29,873 INFO L93 Difference]: Finished difference Result 2133 states and 8026 transitions. [2022-01-18 03:48:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 03:48:29,876 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 [2022-01-18 03:48:29,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:48:29,901 INFO L225 Difference]: With dead ends: 2133 [2022-01-18 03:48:29,901 INFO L226 Difference]: Without dead ends: 2131 [2022-01-18 03:48:29,902 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 [2022-01-18 03:48:29,904 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 [2022-01-18 03:48:29,904 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] [2022-01-18 03:48:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2022-01-18 03:48:29,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 2131. [2022-01-18 03:48:29,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2090 states have (on average 3.838755980861244) internal successors, (8023), 2130 states have internal predecessors, (8023), 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) [2022-01-18 03:48:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 8023 transitions. [2022-01-18 03:48:30,006 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 8023 transitions. Word has length 4 [2022-01-18 03:48:30,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:48:30,006 INFO L470 AbstractCegarLoop]: Abstraction has 2131 states and 8023 transitions. [2022-01-18 03:48:30,006 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) [2022-01-18 03:48:30,007 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 8023 transitions. [2022-01-18 03:48:30,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-18 03:48:30,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:30,009 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-18 03:48:30,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 03:48:30,009 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 2 more)] === [2022-01-18 03:48:30,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1461614924, now seen corresponding path program 1 times [2022-01-18 03:48:30,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:30,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467491316] [2022-01-18 03:48:30,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:30,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:30,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:48:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 03:48:30,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:48:30,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467491316] [2022-01-18 03:48:30,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467491316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:48:30,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:48:30,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 03:48:30,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091813876] [2022-01-18 03:48:30,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:48:30,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 03:48:30,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:48:30,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 03:48:30,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 03:48:30,066 INFO L87 Difference]: Start difference. First operand 2131 states and 8023 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) [2022-01-18 03:48:30,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:48:30,189 INFO L93 Difference]: Finished difference Result 3293 states and 11089 transitions. [2022-01-18 03:48:30,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 03:48:30,189 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 [2022-01-18 03:48:30,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:48:30,212 INFO L225 Difference]: With dead ends: 3293 [2022-01-18 03:48:30,212 INFO L226 Difference]: Without dead ends: 3199 [2022-01-18 03:48:30,212 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 [2022-01-18 03:48:30,215 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 03:48:30,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 29 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 03:48:30,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3199 states. [2022-01-18 03:48:30,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3199 to 2755. [2022-01-18 03:48:30,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2755 states, 2717 states have (on average 3.5888847994111153) internal successors, (9751), 2754 states have internal predecessors, (9751), 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) [2022-01-18 03:48:30,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2755 states to 2755 states and 9751 transitions. [2022-01-18 03:48:30,336 INFO L78 Accepts]: Start accepts. Automaton has 2755 states and 9751 transitions. Word has length 6 [2022-01-18 03:48:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:48:30,337 INFO L470 AbstractCegarLoop]: Abstraction has 2755 states and 9751 transitions. [2022-01-18 03:48:30,337 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) [2022-01-18 03:48:30,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2755 states and 9751 transitions. [2022-01-18 03:48:30,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-18 03:48:30,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:30,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-18 03:48:30,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 03:48:30,343 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 2 more)] === [2022-01-18 03:48:30,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:30,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1461603850, now seen corresponding path program 1 times [2022-01-18 03:48:30,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:30,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392926965] [2022-01-18 03:48:30,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:30,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:30,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:30,354 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:48:30,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:30,371 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:48:30,371 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:48:30,371 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (5 of 6 remaining) [2022-01-18 03:48:30,371 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (4 of 6 remaining) [2022-01-18 03:48:30,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (3 of 6 remaining) [2022-01-18 03:48:30,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 6 remaining) [2022-01-18 03:48:30,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 6 remaining) [2022-01-18 03:48:30,372 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 6 remaining) [2022-01-18 03:48:30,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 03:48:30,373 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-01-18 03:48:30,373 WARN L234 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:48:30,373 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-01-18 03:48:30,383 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:48:30,384 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:48:30,384 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, 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 [2022-01-18 03:48:30,384 INFO L340 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-01-18 03:48:30,385 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 28 transitions, 101 flow [2022-01-18 03:48:30,793 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) [2022-01-18 03:48:30,830 INFO L276 IsEmpty]: Start isEmpty. Operand 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) [2022-01-18 03:48:30,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:48:30,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:30,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:48:30,832 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 3 more)] === [2022-01-18 03:48:30,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:30,834 INFO L85 PathProgramCache]: Analyzing trace with hash 3813566, now seen corresponding path program 1 times [2022-01-18 03:48:30,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:30,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261453971] [2022-01-18 03:48:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:30,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:30,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:48:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:30,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:48:30,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261453971] [2022-01-18 03:48:30,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261453971] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:48:30,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:48:30,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 03:48:30,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518226650] [2022-01-18 03:48:30,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:48:30,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 03:48:30,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:48:30,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 03:48:30,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:48:30,903 INFO L87 Difference]: Start difference. First operand 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) 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) [2022-01-18 03:48:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:48:31,141 INFO L93 Difference]: Finished difference Result 10840 states and 49515 transitions. [2022-01-18 03:48:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 03:48:31,143 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 [2022-01-18 03:48:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:48:31,246 INFO L225 Difference]: With dead ends: 10840 [2022-01-18 03:48:31,246 INFO L226 Difference]: Without dead ends: 10838 [2022-01-18 03:48:31,247 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 [2022-01-18 03:48:31,248 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 03:48:31,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 03:48:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10838 states. [2022-01-18 03:48:31,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10838 to 10838. [2022-01-18 03:48:31,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10838 states, 10750 states have (on average 4.605767441860465) internal successors, (49512), 10837 states have internal predecessors, (49512), 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) [2022-01-18 03:48:31,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10838 states to 10838 states and 49512 transitions. [2022-01-18 03:48:31,872 INFO L78 Accepts]: Start accepts. Automaton has 10838 states and 49512 transitions. Word has length 4 [2022-01-18 03:48:31,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:48:31,872 INFO L470 AbstractCegarLoop]: Abstraction has 10838 states and 49512 transitions. [2022-01-18 03:48:31,872 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) [2022-01-18 03:48:31,872 INFO L276 IsEmpty]: Start isEmpty. Operand 10838 states and 49512 transitions. [2022-01-18 03:48:31,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-18 03:48:31,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:31,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-18 03:48:31,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 03:48:31,874 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 3 more)] === [2022-01-18 03:48:31,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:31,874 INFO L85 PathProgramCache]: Analyzing trace with hash -630106864, now seen corresponding path program 1 times [2022-01-18 03:48:31,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:31,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631455329] [2022-01-18 03:48:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:31,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:48:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:31,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:48:31,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631455329] [2022-01-18 03:48:31,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631455329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 03:48:31,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943696148] [2022-01-18 03:48:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:31,929 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 03:48:31,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 03:48:31,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 03:48:31,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 03:48:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:48:32,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 03:48:32,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 03:48:32,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:32,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 03:48:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:32,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943696148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 03:48:32,149 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 03:48:32,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-01-18 03:48:32,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63468999] [2022-01-18 03:48:32,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 03:48:32,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 03:48:32,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:48:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 03:48:32,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 03:48:32,151 INFO L87 Difference]: Start difference. First operand 10838 states and 49512 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) [2022-01-18 03:48:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:48:32,441 INFO L93 Difference]: Finished difference Result 19096 states and 78036 transitions. [2022-01-18 03:48:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 03:48:32,447 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 [2022-01-18 03:48:32,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:48:32,666 INFO L225 Difference]: With dead ends: 19096 [2022-01-18 03:48:32,667 INFO L226 Difference]: Without dead ends: 18792 [2022-01-18 03:48:32,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 03:48:32,670 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 03:48:32,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 34 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 03:48:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18792 states. [2022-01-18 03:48:33,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18792 to 16354. [2022-01-18 03:48:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16354 states, 16269 states have (on average 4.284282992193742) internal successors, (69701), 16353 states have internal predecessors, (69701), 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) [2022-01-18 03:48:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16354 states to 16354 states and 69701 transitions. [2022-01-18 03:48:33,483 INFO L78 Accepts]: Start accepts. Automaton has 16354 states and 69701 transitions. Word has length 6 [2022-01-18 03:48:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:48:33,484 INFO L470 AbstractCegarLoop]: Abstraction has 16354 states and 69701 transitions. [2022-01-18 03:48:33,484 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) [2022-01-18 03:48:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 16354 states and 69701 transitions. [2022-01-18 03:48:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-18 03:48:33,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:33,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-18 03:48:33,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-18 03:48:33,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 03:48:33,711 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATION === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 3 more)] === [2022-01-18 03:48:33,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:33,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1961891033, now seen corresponding path program 1 times [2022-01-18 03:48:33,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:33,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003107712] [2022-01-18 03:48:33,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:33,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:33,715 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:48:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:33,718 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:48:33,719 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:48:33,719 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATION (6 of 7 remaining) [2022-01-18 03:48:33,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (5 of 7 remaining) [2022-01-18 03:48:33,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (4 of 7 remaining) [2022-01-18 03:48:33,719 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (3 of 7 remaining) [2022-01-18 03:48:33,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 7 remaining) [2022-01-18 03:48:33,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 7 remaining) [2022-01-18 03:48:33,720 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 7 remaining) [2022-01-18 03:48:33,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-18 03:48:33,721 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-01-18 03:48:33,721 WARN L234 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-01-18 03:48:33,721 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-01-18 03:48:33,729 INFO L148 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-01-18 03:48:33,730 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 03:48:33,730 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, 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 [2022-01-18 03:48:33,730 INFO L340 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-01-18 03:48:33,731 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46 places, 33 transitions, 126 flow [2022-01-18 03:48:35,333 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54561 states, 54377 states have (on average 5.387976534196444) internal successors, (292982), 54560 states have internal predecessors, (292982), 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) [2022-01-18 03:48:35,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 54561 states, 54377 states have (on average 5.387976534196444) internal successors, (292982), 54560 states have internal predecessors, (292982), 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) [2022-01-18 03:48:35,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 03:48:35,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:35,466 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 03:48:35,466 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 4 more)] === [2022-01-18 03:48:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash 4833922, now seen corresponding path program 1 times [2022-01-18 03:48:35,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:35,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945838610] [2022-01-18 03:48:35,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:35,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:48:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:35,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:48:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945838610] [2022-01-18 03:48:35,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945838610] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 03:48:35,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 03:48:35,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 03:48:35,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619543493] [2022-01-18 03:48:35,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 03:48:35,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 03:48:35,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:48:35,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 03:48:35,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-18 03:48:35,611 INFO L87 Difference]: Start difference. First operand has 54561 states, 54377 states have (on average 5.387976534196444) internal successors, (292982), 54560 states have internal predecessors, (292982), 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) [2022-01-18 03:48:36,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:48:36,614 INFO L93 Difference]: Finished difference Result 54513 states and 292722 transitions. [2022-01-18 03:48:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 03:48:36,615 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 [2022-01-18 03:48:36,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:48:37,269 INFO L225 Difference]: With dead ends: 54513 [2022-01-18 03:48:37,270 INFO L226 Difference]: Without dead ends: 54511 [2022-01-18 03:48:37,270 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 [2022-01-18 03:48:37,271 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 03:48:37,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 31 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 03:48:37,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54511 states. [2022-01-18 03:48:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54511 to 54511. [2022-01-18 03:48:39,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54511 states, 54328 states have (on average 5.387995140627301) internal successors, (292719), 54510 states have internal predecessors, (292719), 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) [2022-01-18 03:48:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54511 states to 54511 states and 292719 transitions. [2022-01-18 03:48:40,197 INFO L78 Accepts]: Start accepts. Automaton has 54511 states and 292719 transitions. Word has length 4 [2022-01-18 03:48:40,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:48:40,198 INFO L470 AbstractCegarLoop]: Abstraction has 54511 states and 292719 transitions. [2022-01-18 03:48:40,198 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) [2022-01-18 03:48:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 54511 states and 292719 transitions. [2022-01-18 03:48:40,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-01-18 03:48:40,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:40,198 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-01-18 03:48:40,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 03:48:40,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 4 more)] === [2022-01-18 03:48:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:40,199 INFO L85 PathProgramCache]: Analyzing trace with hash 350441192, now seen corresponding path program 1 times [2022-01-18 03:48:40,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:40,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689032083] [2022-01-18 03:48:40,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:40,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:48:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:40,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 03:48:40,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689032083] [2022-01-18 03:48:40,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689032083] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 03:48:40,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521405027] [2022-01-18 03:48:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:40,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 03:48:40,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 03:48:40,226 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 03:48:40,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 03:48:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 03:48:40,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-18 03:48:40,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 03:48:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:40,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 03:48:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 03:48:40,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521405027] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 03:48:40,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 03:48:40,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-01-18 03:48:40,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356184494] [2022-01-18 03:48:40,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 03:48:40,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 03:48:40,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 03:48:40,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 03:48:40,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 03:48:40,308 INFO L87 Difference]: Start difference. First operand 54511 states and 292719 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) [2022-01-18 03:48:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 03:48:41,707 INFO L93 Difference]: Finished difference Result 102108 states and 489499 transitions. [2022-01-18 03:48:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 03:48:41,708 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 [2022-01-18 03:48:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 03:48:42,421 INFO L225 Difference]: With dead ends: 102108 [2022-01-18 03:48:42,421 INFO L226 Difference]: Without dead ends: 101140 [2022-01-18 03:48:42,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-18 03:48:42,422 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 03:48:42,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 03:48:42,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101140 states. [2022-01-18 03:48:45,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101140 to 89680. [2022-01-18 03:48:46,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89680 states, 89500 states have (on average 4.972145251396648) internal successors, (445007), 89679 states have internal predecessors, (445007), 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) [2022-01-18 03:48:46,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89680 states to 89680 states and 445007 transitions. [2022-01-18 03:48:46,592 INFO L78 Accepts]: Start accepts. Automaton has 89680 states and 445007 transitions. Word has length 6 [2022-01-18 03:48:46,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 03:48:46,592 INFO L470 AbstractCegarLoop]: Abstraction has 89680 states and 445007 transitions. [2022-01-18 03:48:46,592 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) [2022-01-18 03:48:46,592 INFO L276 IsEmpty]: Start isEmpty. Operand 89680 states and 445007 transitions. [2022-01-18 03:48:46,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-18 03:48:46,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 03:48:46,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 03:48:46,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 03:48:46,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 03:48:46,796 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting threadErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT (and 4 more)] === [2022-01-18 03:48:46,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 03:48:46,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1766986721, now seen corresponding path program 1 times [2022-01-18 03:48:46,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 03:48:46,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518928295] [2022-01-18 03:48:46,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 03:48:46,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 03:48:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:46,801 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 03:48:46,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 03:48:46,804 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 03:48:46,804 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 03:48:46,805 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location threadErr0ASSERT_VIOLATIONASSERT (7 of 8 remaining) [2022-01-18 03:48:46,805 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (6 of 8 remaining) [2022-01-18 03:48:46,805 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (5 of 8 remaining) [2022-01-18 03:48:46,805 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (4 of 8 remaining) [2022-01-18 03:48:46,805 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (3 of 8 remaining) [2022-01-18 03:48:46,805 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (2 of 8 remaining) [2022-01-18 03:48:46,805 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (1 of 8 remaining) [2022-01-18 03:48:46,806 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location threadErr0ASSERT_VIOLATIONASSERT (0 of 8 remaining) [2022-01-18 03:48:46,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-18 03:48:46,806 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-01-18 03:48:46,809 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 6 thread instances [2022-01-18 03:48:46,809 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 03:48:46,823 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:48:46 BasicIcfg [2022-01-18 03:48:46,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 03:48:46,823 INFO L158 Benchmark]: Toolchain (without parser) took 18052.72ms. Allocated memory was 367.0MB in the beginning and 11.6GB in the end (delta: 11.2GB). Free memory was 327.3MB in the beginning and 9.7GB in the end (delta: -9.4GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2022-01-18 03:48:46,824 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 367.0MB. Free memory is still 328.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 03:48:46,824 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.31ms. Allocated memory is still 367.0MB. Free memory was 327.1MB in the beginning and 325.6MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 03:48:46,824 INFO L158 Benchmark]: Boogie Preprocessor took 14.08ms. Allocated memory is still 367.0MB. Free memory was 325.6MB in the beginning and 324.7MB in the end (delta: 831.7kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 03:48:46,824 INFO L158 Benchmark]: RCFGBuilder took 186.57ms. Allocated memory is still 367.0MB. Free memory was 324.6MB in the beginning and 316.8MB in the end (delta: 7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 03:48:46,825 INFO L158 Benchmark]: TraceAbstraction took 17814.47ms. Allocated memory was 367.0MB in the beginning and 11.6GB in the end (delta: 11.2GB). Free memory was 316.4MB in the beginning and 9.7GB in the end (delta: -9.4GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. [2022-01-18 03:48:46,825 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 0.12ms. Allocated memory is still 367.0MB. Free memory is still 328.2MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.31ms. Allocated memory is still 367.0MB. Free memory was 327.1MB in the beginning and 325.6MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 14.08ms. Allocated memory is still 367.0MB. Free memory was 325.6MB in the beginning and 324.7MB in the end (delta: 831.7kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 186.57ms. Allocated memory is still 367.0MB. Free memory was 324.6MB in the beginning and 316.8MB in the end (delta: 7.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 17814.47ms. Allocated memory was 367.0MB in the beginning and 11.6GB in the end (delta: 11.2GB). Free memory was 316.4MB in the beginning and 9.7GB in the end (delta: -9.4GB). Peak memory consumption was 1.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 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: 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: 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: 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: 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] [L26] FORK 0 fork 0 thread(); VAL [x=1] [L26] FORK 0 fork 0 thread(); VAL [x=1] [L16] 2 x := x + 1; VAL [x=2] [L16] 3 x := x + 1; VAL [x=3] [L17] 2 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: 0.1s, OverallIterations: 1, TraceHistogramMax: 1, 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=15occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 3 NumberOfCodeBlocks, 3 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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: 0.0s, OverallIterations: 1, TraceHistogramMax: 1, 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=81occurred in iteration=0, InterpolantAutomatonStates: 0, 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, 4 NumberOfCodeBlocks, 4 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 15 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 15 mSDsluCounter, 19 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 30 IncrementalHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 9 mSDtfsCounter, 30 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=423occurred 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: 0.1s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 9 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 4 thread instances CFG has 6 procedures, 29 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 69 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 69 mSDsluCounter, 52 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 41 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 83 IncrementalHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 22 mSDtfsCounter, 83 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2755occurred in iteration=2, 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: 0.2s AutomataMinimizationTime, 2 MinimizatonAttempts, 444 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 24 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 5 thread instances CFG has 7 procedures, 34 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 3.3s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 61 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 61 mSDsluCounter, 61 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 51 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 116 IncrementalHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 26 mSDtfsCounter, 116 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=16354occurred in iteration=2, 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: 1.4s AutomataMinimizationTime, 2 MinimizatonAttempts, 2438 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 23 NumberOfCodeBlocks, 23 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 54 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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 6 thread instances CFG has 8 procedures, 39 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 13.1s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.1s, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 79 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 79 mSDsluCounter, 70 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 61 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 135 IncrementalHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 30 mSDtfsCounter, 135 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=89680occurred in iteration=2, 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: 7.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 11460 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 54 SizeOfPredicates, 0 NumberOfNonLiveVariables, 13 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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! [2022-01-18 03:48:46,864 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...