/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/join_assign_global.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 18:38:03,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 18:38:03,410 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 18:38:03,450 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 18:38:03,493 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 [2022-03-03 18:38:03,515 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 18:38:03,515 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 18:38:03,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 18:38:03,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 18:38:03,516 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 18:38:03,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 18:38:03,517 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 18:38:03,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 18:38:03,517 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 18:38:03,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 18:38:03,518 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 18:38:03,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 18:38:03,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 18:38:03,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 18:38:03,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 18:38:03,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 18:38:03,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 18:38:03,518 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 18:38:03,518 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 18:38:03,518 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 18:38:03,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 18:38:03,519 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 18:38:03,519 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 18:38:03,519 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 18:38:03,520 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 18:38:03,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 18:38:03,520 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 18:38:03,520 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 18:38:03,520 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 18:38:03,520 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 18:38:03,520 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 18:38:03,520 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 18:38:03,520 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 18:38:03,521 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 18:38:03,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 18:38:03,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 18:38:03,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 18:38:03,725 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 18:38:03,726 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 18:38:03,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/join_assign_global.bpl [2022-03-03 18:38:03,727 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/join_assign_global.bpl' [2022-03-03 18:38:03,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 18:38:03,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 18:38:03,745 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 18:38:03,745 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 18:38:03,745 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 18:38:03,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/1) ... [2022-03-03 18:38:03,757 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/1) ... [2022-03-03 18:38:03,762 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 18:38:03,763 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 18:38:03,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 18:38:03,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 18:38:03,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 18:38:03,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/1) ... [2022-03-03 18:38:03,770 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/1) ... [2022-03-03 18:38:03,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/1) ... [2022-03-03 18:38:03,771 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/1) ... [2022-03-03 18:38:03,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/1) ... [2022-03-03 18:38:03,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/1) ... [2022-03-03 18:38:03,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/1) ... [2022-03-03 18:38:03,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 18:38:03,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 18:38:03,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 18:38:03,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 18:38:03,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/1) ... [2022-03-03 18:38:03,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 18:38:03,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 18:38:03,825 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) [2022-03-03 18:38:03,830 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 [2022-03-03 18:38:03,848 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread0 given in one single declaration [2022-03-03 18:38:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-03-03 18:38:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-03-03 18:38:03,848 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 18:38:03,848 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 18:38:03,848 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 18:38:03,849 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 18:38:03,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 18:38:03,849 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 18:38:03,849 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 18:38:03,877 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 18:38:03,878 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 18:38:03,918 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 18:38:03,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 18:38:03,922 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 18:38:03,923 INFO L202 PluginConnector]: Adding new model join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 06:38:03 BoogieIcfgContainer [2022-03-03 18:38:03,923 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 18:38:03,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 18:38:03,925 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 18:38:03,926 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 18:38:03,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 06:38:03" (1/2) ... [2022-03-03 18:38:03,927 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7317e46 and model type join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 06:38:03, skipping insertion in model container [2022-03-03 18:38:03,927 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 06:38:03" (2/2) ... [2022-03-03 18:38:03,928 INFO L111 eAbstractionObserver]: Analyzing ICFG join_assign_global.bpl [2022-03-03 18:38:03,931 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 18:38:03,931 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 18:38:03,931 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 18:38:03,931 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 18:38:03,943 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-03 18:38:03,943 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-03 18:38:03,946 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-03 18:38:03,949 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-03 18:38:03,975 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 18:38:03,979 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 18:38:03,979 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-03 18:38:03,987 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 13 transitions, 39 flow [2022-03-03 18:38:03,999 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 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) [2022-03-03 18:38:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 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) [2022-03-03 18:38:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-03-03 18:38:04,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:38:04,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-03-03 18:38:04,005 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:38:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:38:04,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1694694, now seen corresponding path program 1 times [2022-03-03 18:38:04,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:38:04,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836710193] [2022-03-03 18:38:04,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:38:04,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:38:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 18:38:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 18:38:04,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 18:38:04,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836710193] [2022-03-03 18:38:04,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836710193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 18:38:04,116 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 18:38:04,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-03 18:38:04,118 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579847501] [2022-03-03 18:38:04,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 18:38:04,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 18:38:04,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 18:38:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 18:38:04,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 18:38:04,148 INFO L87 Difference]: Start difference. First operand has 19 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 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 3 states, 2 states have (on average 2.0) 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) [2022-03-03 18:38:04,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 18:38:04,193 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-03-03 18:38:04,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 18:38:04,194 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) 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 [2022-03-03 18:38:04,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 18:38:04,199 INFO L225 Difference]: With dead ends: 18 [2022-03-03 18:38:04,199 INFO L226 Difference]: Without dead ends: 14 [2022-03-03 18:38:04,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 18:38:04,202 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 18:38:04,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 11 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 18:38:04,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-03-03 18:38:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-03-03 18:38:04,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-03-03 18:38:04,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-03-03 18:38:04,231 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 4 [2022-03-03 18:38:04,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 18:38:04,232 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-03-03 18:38:04,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) 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) [2022-03-03 18:38:04,232 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-03-03 18:38:04,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-03-03 18:38:04,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 18:38:04,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-03-03 18:38:04,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 18:38:04,233 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 18:38:04,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 18:38:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1246605728, now seen corresponding path program 1 times [2022-03-03 18:38:04,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 18:38:04,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2658083] [2022-03-03 18:38:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 18:38:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 18:38:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-03 18:38:04,259 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-03 18:38:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-03 18:38:04,276 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-03 18:38:04,277 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-03-03 18:38:04,279 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-03 18:38:04,280 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-03 18:38:04,281 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-03 18:38:04,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-03 18:38:04,283 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-03-03 18:38:04,289 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 18:38:04,289 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 18:38:04,299 INFO L202 PluginConnector]: Adding new model join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 06:38:04 BasicIcfg [2022-03-03 18:38:04,299 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 18:38:04,300 INFO L158 Benchmark]: Toolchain (without parser) took 555.32ms. Allocated memory was 167.8MB in the beginning and 227.5MB in the end (delta: 59.8MB). Free memory was 125.9MB in the beginning and 202.1MB in the end (delta: -76.3MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 18:38:04,300 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 167.8MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 18:38:04,302 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.79ms. Allocated memory is still 167.8MB. Free memory was 125.8MB in the beginning and 124.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 18:38:04,303 INFO L158 Benchmark]: Boogie Preprocessor took 9.02ms. Allocated memory is still 167.8MB. Free memory was 124.2MB in the beginning and 123.4MB in the end (delta: 757.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 18:38:04,305 INFO L158 Benchmark]: RCFGBuilder took 149.04ms. Allocated memory is still 167.8MB. Free memory was 123.3MB in the beginning and 115.8MB in the end (delta: 7.5MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-03-03 18:38:04,305 INFO L158 Benchmark]: TraceAbstraction took 374.48ms. Allocated memory was 167.8MB in the beginning and 227.5MB in the end (delta: 59.8MB). Free memory was 115.4MB in the beginning and 202.1MB in the end (delta: -86.7MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 18:38:04,307 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 0.09ms. Allocated memory is still 167.8MB. Free memory is still 126.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.79ms. Allocated memory is still 167.8MB. Free memory was 125.8MB in the beginning and 124.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.02ms. Allocated memory is still 167.8MB. Free memory was 124.2MB in the beginning and 123.4MB in the end (delta: 757.4kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 149.04ms. Allocated memory is still 167.8MB. Free memory was 123.3MB in the beginning and 115.8MB in the end (delta: 7.5MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 374.48ms. Allocated memory was 167.8MB in the beginning and 227.5MB in the end (delta: 59.8MB). Free memory was 115.4MB in the beginning and 202.1MB in the end (delta: -86.7MB). There was no memory consumed. Max. memory is 8.0GB. * 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 - CounterExampleResult [Line: 20]: assertion can be violated assertion can be violated We found a FailurePath: [L17] FORK 0 fork 0 thread0(); [L25] 1 z := 1; VAL [z=1] [L18] FORK 0 fork 1, 1 thread1(); VAL [z=1] [L19] 0 x := 0; VAL [x=0, z=1] [L31] JOIN 1 join 0 assign x; VAL [x=1, z=1] [L20] 0 assert x == 0; VAL [x=1, z=1] - UnprovableResult [Line: 14]: 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. - UnprovableResult [Line: 17]: 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 5 procedures, 21 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 11 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 9 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 8 mSDtfsCounter, 9 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 11 NumberOfCodeBlocks, 11 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 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 RESULT: Ultimate proved your program to be incorrect! [2022-03-03 18:38:04,343 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...