/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.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-c7b2d19 [2022-03-15 20:34:59,561 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 20:34:59,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 20:34:59,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 20:34:59,654 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 20:34:59,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 20:34:59,656 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 20:34:59,657 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 20:34:59,682 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 20:34:59,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 20:34:59,684 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 20:34:59,684 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 20:34:59,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 20:34:59,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 20:34:59,685 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 20:34:59,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 20:34:59,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 20:34:59,685 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 20:34:59,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 20:34:59,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 20:34:59,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 20:34:59,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 20:34:59,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 20:34:59,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 20:34:59,687 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 20:34:59,687 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 20:34:59,687 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 20:34:59,687 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 20:34:59,687 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 20:34:59,688 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 20:34:59,688 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 20:34:59,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:34:59,688 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 20:34:59,688 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 20:34:59,688 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 20:34:59,688 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 20:34:59,688 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 20:34:59,689 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 20:34:59,689 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 20:34:59,689 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 20:34:59,689 INFO L138 SettingsManager]: * Interpolant automaton=MCR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 20:34:59,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 20:34:59,886 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 20:34:59,887 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 20:34:59,888 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 20:34:59,889 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 20:34:59,889 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/join_assign_global.bpl [2022-03-15 20:34:59,890 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/join_assign_global.bpl' [2022-03-15 20:34:59,904 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 20:34:59,905 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 20:34:59,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 20:34:59,906 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 20:34:59,906 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 20:34:59,916 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 15.03 08:34:59" (1/1) ... [2022-03-15 20:34:59,921 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 15.03 08:34:59" (1/1) ... [2022-03-15 20:34:59,927 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 20:34:59,928 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 20:34:59,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 20:34:59,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 20:34:59,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 20:34:59,934 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:59" (1/1) ... [2022-03-15 20:34:59,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:59" (1/1) ... [2022-03-15 20:34:59,935 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:59" (1/1) ... [2022-03-15 20:34:59,935 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:59" (1/1) ... [2022-03-15 20:34:59,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:59" (1/1) ... [2022-03-15 20:34:59,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:59" (1/1) ... [2022-03-15 20:34:59,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:59" (1/1) ... [2022-03-15 20:34:59,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 20:34:59,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 20:34:59,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 20:34:59,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 20:34:59,940 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:59" (1/1) ... [2022-03-15 20:34:59,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:34:59,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:34:59,965 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) [2022-03-15 20:34:59,970 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 [2022-03-15 20:34:59,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread0 given in one single declaration [2022-03-15 20:34:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread0 [2022-03-15 20:34:59,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread0 [2022-03-15 20:34:59,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 20:34:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 20:34:59,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 20:34:59,996 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 20:34:59,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 20:34:59,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 20:34:59,997 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 20:35:00,029 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 20:35:00,031 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 20:35:00,094 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 20:35:00,102 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 20:35:00,103 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 20:35:00,106 INFO L202 PluginConnector]: Adding new model join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:35:00 BoogieIcfgContainer [2022-03-15 20:35:00,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 20:35:00,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 20:35:00,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 20:35:00,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 20:35:00,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:59" (1/2) ... [2022-03-15 20:35:00,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6830cdbd and model type join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 08:35:00, skipping insertion in model container [2022-03-15 20:35:00,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:35:00" (2/2) ... [2022-03-15 20:35:00,118 INFO L111 eAbstractionObserver]: Analyzing ICFG join_assign_global.bpl [2022-03-15 20:35:00,122 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 20:35:00,122 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 20:35:00,122 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 20:35:00,122 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 20:35:00,147 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:35:00,147 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:35:00,154 WARN L322 ript$VariableManager]: TermVariabe thread0Thread1of1ForFork0_z not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:35:00,166 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 20:35:00,199 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 20:35:00,209 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, 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=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 20:35:00,210 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 20:35:00,222 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 20:35:00,232 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 13 transitions, 39 flow [2022-03-15 20:35:00,234 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 13 transitions, 39 flow [2022-03-15 20:35:00,235 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 13 transitions, 39 flow [2022-03-15 20:35:00,256 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2022-03-15 20:35:00,256 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-03-15 20:35:00,257 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 10 events. 0/10 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-03-15 20:35:00,258 INFO L116 LiptonReduction]: Number of co-enabled transitions 36 [2022-03-15 20:35:00,306 INFO L131 LiptonReduction]: Checked pairs total: 45 [2022-03-15 20:35:00,306 INFO L133 LiptonReduction]: Total number of compositions: 2 [2022-03-15 20:35:00,313 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 19 places, 11 transitions, 35 flow [2022-03-15 20:35:00,323 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-03-15 20:35:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-03-15 20:35:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-03-15 20:35:00,342 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:35:00,343 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2022-03-15 20:35:00,343 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:35:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:35:00,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1694694, now seen corresponding path program 1 times [2022-03-15 20:35:00,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:35:00,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941245505] [2022-03-15 20:35:00,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:35:00,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:35:00,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:35:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 20:35:00,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:35:00,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941245505] [2022-03-15 20:35:00,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941245505] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:35:00,472 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:35:00,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 20:35:00,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1260412688] [2022-03-15 20:35:00,474 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:35:00,475 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:35:00,483 INFO L252 McrAutomatonBuilder]: Finished intersection with 5 states and 4 transitions. [2022-03-15 20:35:00,483 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:35:00,486 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:35:00,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 20:35:00,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:35:00,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 20:35:00,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 20:35:00,507 INFO L87 Difference]: Start difference. First operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 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) [2022-03-15 20:35:00,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:35:00,522 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2022-03-15 20:35:00,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 20:35:00,524 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 [2022-03-15 20:35:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:35:00,529 INFO L225 Difference]: With dead ends: 15 [2022-03-15 20:35:00,529 INFO L226 Difference]: Without dead ends: 11 [2022-03-15 20:35:00,530 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 [2022-03-15 20:35:00,533 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:35:00,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 5 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:35:00,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-03-15 20:35:00,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-03-15 20:35:00,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 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) [2022-03-15 20:35:00,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-03-15 20:35:00,581 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 4 [2022-03-15 20:35:00,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:35:00,581 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-03-15 20:35:00,582 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) [2022-03-15 20:35:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-03-15 20:35:00,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-03-15 20:35:00,582 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:35:00,582 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-03-15 20:35:00,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 20:35:00,583 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:35:00,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:35:00,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1628614343, now seen corresponding path program 1 times [2022-03-15 20:35:00,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:35:00,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459987845] [2022-03-15 20:35:00,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:35:00,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:35:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:35:00,595 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-15 20:35:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:35:00,614 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-15 20:35:00,615 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-03-15 20:35:00,616 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 20:35:00,618 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 20:35:00,618 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 20:35:00,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 20:35:00,620 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-03-15 20:35:00,624 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 20:35:00,624 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 20:35:00,632 INFO L202 PluginConnector]: Adding new model join_assign_global.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 08:35:00 BasicIcfg [2022-03-15 20:35:00,633 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 20:35:00,633 INFO L158 Benchmark]: Toolchain (without parser) took 728.41ms. Allocated memory was 176.2MB in the beginning and 267.4MB in the end (delta: 91.2MB). Free memory was 135.3MB in the beginning and 236.3MB in the end (delta: -101.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:35:00,634 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 176.2MB. Free memory is still 136.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:35:00,634 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.64ms. Allocated memory is still 176.2MB. Free memory was 135.1MB in the beginning and 133.7MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 20:35:00,635 INFO L158 Benchmark]: Boogie Preprocessor took 9.22ms. Allocated memory is still 176.2MB. Free memory was 133.7MB in the beginning and 132.8MB in the end (delta: 918.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:35:00,635 INFO L158 Benchmark]: RCFGBuilder took 167.49ms. Allocated memory is still 176.2MB. Free memory was 132.8MB in the beginning and 125.3MB in the end (delta: 7.5MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-03-15 20:35:00,636 INFO L158 Benchmark]: TraceAbstraction took 523.06ms. Allocated memory was 176.2MB in the beginning and 267.4MB in the end (delta: 91.2MB). Free memory was 124.8MB in the beginning and 236.3MB in the end (delta: -111.5MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:35:00,638 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 176.2MB. Free memory is still 136.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.64ms. Allocated memory is still 176.2MB. Free memory was 135.1MB in the beginning and 133.7MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.22ms. Allocated memory is still 176.2MB. Free memory was 133.7MB in the beginning and 132.8MB in the end (delta: 918.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 167.49ms. Allocated memory is still 176.2MB. Free memory was 132.8MB in the beginning and 125.3MB in the end (delta: 7.5MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 523.06ms. Allocated memory was 176.2MB in the beginning and 267.4MB in the end (delta: 91.2MB). Free memory was 124.8MB in the beginning and 236.3MB in the end (delta: -111.5MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 21 PlacesBefore, 19 PlacesAfterwards, 13 TransitionsBefore, 11 TransitionsAfterwards, 36 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 2 TotalNumberOfCompositions, 45 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 41, positive: 32, positive conditional: 0, positive unconditional: 32, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 19, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 41, positive: 17, positive conditional: 0, positive unconditional: 17, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 19, unknown conditional: 0, unknown unconditional: 19] , Statistics on independence cache: Total cache size (in pairs): 10, Positive cache size: 7, Positive conditional cache size: 0, Positive unconditional cache size: 7, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3 - 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(); [L18] FORK 0 fork 1, 1 thread1(); [L19] 0 x := 0; VAL [x=0] [L25] 1 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: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2 mSDsluCounter, 5 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12 IncrementalHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 4 mSDtfsCounter, 12 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=15occurred 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, 10 NumberOfCodeBlocks, 10 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! [2022-03-15 20:35:00,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...