/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-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/join_assign_global.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 14:07:54,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 14:07:54,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 14:07:54,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 14:07:54,811 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-Separate.epf [2022-01-18 14:07:54,827 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 14:07:54,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 14:07:54,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 14:07:54,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 14:07:54,828 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 14:07:54,828 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 14:07:54,829 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 14:07:54,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 14:07:54,829 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 14:07:54,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 14:07:54,829 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 14:07:54,830 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 14:07:54,830 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 14:07:54,831 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 14:07:54,831 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 14:07:54,831 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:07:54,831 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 14:07:54,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 14:07:54,832 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 14:07:54,832 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 14:07:54,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 14:07:54,832 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 14:07:54,832 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 14:07:54,832 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 14:07:54,832 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 14:07:55,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 14:07:55,068 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 14:07:55,070 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 14:07:55,071 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 14:07:55,073 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 14:07:55,074 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/join_assign_global.bpl [2022-01-18 14:07:55,074 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/join_assign_global.bpl' [2022-01-18 14:07:55,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 14:07:55,089 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 14:07:55,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 14:07:55,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 14:07:55,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 14:07:55,098 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 18.01 02:07:55" (1/1) ... [2022-01-18 14:07:55,102 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 18.01 02:07:55" (1/1) ... [2022-01-18 14:07:55,106 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 14:07:55,107 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 14:07:55,107 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 14:07:55,107 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 14:07:55,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 14:07:55,112 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:07:55" (1/1) ... [2022-01-18 14:07:55,112 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:07:55" (1/1) ... [2022-01-18 14:07:55,112 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:07:55" (1/1) ... [2022-01-18 14:07:55,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:07:55" (1/1) ... [2022-01-18 14:07:55,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:07:55" (1/1) ... [2022-01-18 14:07:55,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:07:55" (1/1) ... [2022-01-18 14:07:55,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:07:55" (1/1) ... [2022-01-18 14:07:55,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 14:07:55,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 14:07:55,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 14:07:55,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 14:07:55,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:07:55" (1/1) ... [2022-01-18 14:07:55,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 14:07:55,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 14:07:55,146 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 14:07:55,161 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 14:07:55,187 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread0 given in one single declaration [2022-01-18 14:07:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-01-18 14:07:55,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-01-18 14:07:55,187 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 14:07:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 14:07:55,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 14:07:55,187 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 14:07:55,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 14:07:55,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 14:07:55,188 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 14:07:55,215 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 14:07:55,216 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 14:07:55,252 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 14:07:55,256 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 14:07:55,256 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 14:07:55,257 INFO L202 PluginConnector]: Adding new model join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:07:55 BoogieIcfgContainer [2022-01-18 14:07:55,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 14:07:55,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 14:07:55,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 14:07:55,261 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 14:07:55,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 02:07:55" (1/2) ... [2022-01-18 14:07:55,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ff19028 and model type join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 02:07:55, skipping insertion in model container [2022-01-18 14:07:55,262 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 02:07:55" (2/2) ... [2022-01-18 14:07:55,262 INFO L111 eAbstractionObserver]: Analyzing ICFG join_assign_global.bpl [2022-01-18 14:07:55,265 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 14:07:55,265 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 14:07:55,266 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 14:07:55,266 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 14:07:55,277 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 14:07:55,277 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 14:07:55,280 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-01-18 14:07:55,283 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 14:07:55,309 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 14:07:55,313 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 14:07:55,314 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 14:07:55,319 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 13 transitions, 39 flow [2022-01-18 14:07:55,328 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) [2022-01-18 14:07:55,329 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) [2022-01-18 14:07:55,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-01-18 14:07:55,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:07:55,333 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-01-18 14:07:55,334 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:07:55,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:07:55,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1694694, now seen corresponding path program 1 times [2022-01-18 14:07:55,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:07:55,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893471800] [2022-01-18 14:07:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:07:55,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:07:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 14:07:55,417 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 14:07:55,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 14:07:55,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893471800] [2022-01-18 14:07:55,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893471800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 14:07:55,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 14:07:55,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-18 14:07:55,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961446212] [2022-01-18 14:07:55,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 14:07:55,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 14:07:55,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 14:07:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 14:07:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 14:07:55,441 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) [2022-01-18 14:07:55,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 14:07:55,456 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2022-01-18 14:07:55,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 14:07:55,458 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 [2022-01-18 14:07:55,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 14:07:55,463 INFO L225 Difference]: With dead ends: 18 [2022-01-18 14:07:55,463 INFO L226 Difference]: Without dead ends: 14 [2022-01-18 14:07:55,464 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 [2022-01-18 14:07:55,467 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 [2022-01-18 14:07:55,468 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] [2022-01-18 14:07:55,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-01-18 14:07:55,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-01-18 14:07:55,512 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) [2022-01-18 14:07:55,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-01-18 14:07:55,515 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 4 [2022-01-18 14:07:55,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 14:07:55,515 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-01-18 14:07:55,515 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) [2022-01-18 14:07:55,515 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-01-18 14:07:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-18 14:07:55,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 14:07:55,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-18 14:07:55,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 14:07:55,519 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 14:07:55,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 14:07:55,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1246605728, now seen corresponding path program 1 times [2022-01-18 14:07:55,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 14:07:55,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010123011] [2022-01-18 14:07:55,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 14:07:55,525 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 14:07:55,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 14:07:55,532 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-18 14:07:55,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-18 14:07:55,547 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-01-18 14:07:55,547 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-18 14:07:55,548 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 14:07:55,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 14:07:55,549 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 14:07:55,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 14:07:55,551 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-18 14:07:55,554 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 14:07:55,554 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 14:07:55,562 INFO L202 PluginConnector]: Adding new model join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 02:07:55 BasicIcfg [2022-01-18 14:07:55,562 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 14:07:55,563 INFO L158 Benchmark]: Toolchain (without parser) took 473.14ms. Allocated memory is still 381.7MB. Free memory was 346.2MB in the beginning and 349.0MB in the end (delta: -2.7MB). Peak memory consumption was 532.2kB. Max. memory is 16.0GB. [2022-01-18 14:07:55,563 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 381.7MB. Free memory is still 347.2MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:07:55,564 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.51ms. Allocated memory is still 381.7MB. Free memory was 346.2MB in the beginning and 344.6MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 14:07:55,564 INFO L158 Benchmark]: Boogie Preprocessor took 8.15ms. Allocated memory is still 381.7MB. Free memory was 344.6MB in the beginning and 343.8MB in the end (delta: 826.6kB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:07:55,564 INFO L158 Benchmark]: RCFGBuilder took 141.51ms. Allocated memory is still 381.7MB. Free memory was 343.7MB in the beginning and 336.1MB in the end (delta: 7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 14:07:55,565 INFO L158 Benchmark]: TraceAbstraction took 303.54ms. Allocated memory is still 381.7MB. Free memory was 335.7MB in the beginning and 349.0MB in the end (delta: -13.3MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 14:07:55,566 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 0.11ms. Allocated memory is still 381.7MB. Free memory is still 347.2MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 16.51ms. Allocated memory is still 381.7MB. Free memory was 346.2MB in the beginning and 344.6MB in the end (delta: 1.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 8.15ms. Allocated memory is still 381.7MB. Free memory was 344.6MB in the beginning and 343.8MB in the end (delta: 826.6kB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 141.51ms. Allocated memory is still 381.7MB. Free memory was 343.7MB in the beginning and 336.1MB in the end (delta: 7.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 303.54ms. Allocated memory is still 381.7MB. Free memory was 335.7MB in the beginning and 349.0MB in the end (delta: -13.3MB). There was no memory consumed. 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 - 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: 0.2s, 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! [2022-01-18 14:07:55,591 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...