/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/fork_unchanged_local_variables2.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 20:34:57,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 20:34:57,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 20:34:57,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 20:34:57,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 20:34:57,679 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 20:34:57,680 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 20:34:57,696 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 20:34:57,709 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 20:34:57,709 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 20:34:57,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 20:34:57,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 20:34:57,710 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 20:34:57,710 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 20:34:57,710 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 20:34:57,711 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 20:34:57,711 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 20:34:57,711 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 20:34:57,711 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 20:34:57,711 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 20:34:57,711 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 20:34:57,711 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 20:34:57,712 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 20:34:57,712 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 20:34:57,712 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 20:34:57,712 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 20:34:57,712 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 20:34:57,712 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 20:34:57,712 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 20:34:57,712 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 20:34:57,713 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 20:34:57,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:34:57,713 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 20:34:57,713 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 20:34:57,713 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 20:34:57,713 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 20:34:57,713 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 20:34:57,713 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 20:34:57,714 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 20:34:57,714 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 20:34:57,714 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 20:34:57,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 20:34:57,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 20:34:57,923 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 20:34:57,924 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 20:34:57,924 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 20:34:57,926 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl [2022-03-15 20:34:57,927 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/fork_unchanged_local_variables2.bpl' [2022-03-15 20:34:57,944 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 20:34:57,945 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 20:34:57,950 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 20:34:57,951 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 20:34:57,951 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 20:34:57,959 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/1) ... [2022-03-15 20:34:57,963 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/1) ... [2022-03-15 20:34:57,967 INFO L137 Inliner]: procedures = 2, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 20:34:57,968 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 20:34:57,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 20:34:57,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 20:34:57,969 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 20:34:57,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/1) ... [2022-03-15 20:34:57,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/1) ... [2022-03-15 20:34:57,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/1) ... [2022-03-15 20:34:57,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/1) ... [2022-03-15 20:34:57,976 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/1) ... [2022-03-15 20:34:57,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/1) ... [2022-03-15 20:34:57,978 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/1) ... [2022-03-15 20:34:57,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 20:34:57,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 20:34:57,982 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 20:34:57,982 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 20:34:57,984 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/1) ... [2022-03-15 20:34:57,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:34:57,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:34:58,010 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 20:34:58,035 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 20:34:58,050 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2022-03-15 20:34:58,050 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-03-15 20:34:58,050 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-03-15 20:34:58,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 20:34:58,051 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 20:34:58,051 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 20:34:58,087 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 20:34:58,088 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 20:34:58,153 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 20:34:58,158 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 20:34:58,158 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 20:34:58,159 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:34:58 BoogieIcfgContainer [2022-03-15 20:34:58,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 20:34:58,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 20:34:58,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 20:34:58,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 20:34:58,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:57" (1/2) ... [2022-03-15 20:34:58,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5460fc9d and model type fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 08:34:58, skipping insertion in model container [2022-03-15 20:34:58,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:34:58" (2/2) ... [2022-03-15 20:34:58,180 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_unchanged_local_variables2.bpl [2022-03-15 20:34:58,183 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 20:34:58,183 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 20:34:58,184 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 20:34:58,184 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 20:34:58,201 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:58,201 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:58,201 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:58,201 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:58,204 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:58,204 WARN L322 ript$VariableManager]: TermVariabe fooThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:58,206 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-03-15 20:34:58,245 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 20:34:58,253 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 20:34:58,253 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-03-15 20:34:58,261 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 20:34:58,273 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 18 places, 16 transitions, 40 flow [2022-03-15 20:34:58,275 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 18 places, 16 transitions, 40 flow [2022-03-15 20:34:58,276 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 18 places, 16 transitions, 40 flow [2022-03-15 20:34:58,296 INFO L129 PetriNetUnfolder]: 2/15 cut-off events. [2022-03-15 20:34:58,296 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-03-15 20:34:58,301 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 15 events. 2/15 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 5. Up to 2 conditions per place. [2022-03-15 20:34:58,302 INFO L116 LiptonReduction]: Number of co-enabled transitions 4 [2022-03-15 20:34:58,516 INFO L131 LiptonReduction]: Checked pairs total: 8 [2022-03-15 20:34:58,516 INFO L133 LiptonReduction]: Total number of compositions: 8 [2022-03-15 20:34:58,523 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 13 places, 10 transitions, 28 flow [2022-03-15 20:34:58,534 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 20:34:58,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 20:34:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-03-15 20:34:58,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:34:58,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-03-15 20:34:58,541 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-03-15 20:34:58,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:34:58,546 INFO L85 PathProgramCache]: Analyzing trace with hash -256475573, now seen corresponding path program 1 times [2022-03-15 20:34:58,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:34:58,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694815376] [2022-03-15 20:34:58,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:34:58,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:34:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:34:58,664 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 20:34:58,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:34:58,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694815376] [2022-03-15 20:34:58,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694815376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:34:58,665 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:34:58,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 20:34:58,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [239770666] [2022-03-15 20:34:58,667 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:34:58,668 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:34:58,682 INFO L252 McrAutomatonBuilder]: Finished intersection with 9 states and 9 transitions. [2022-03-15 20:34:58,682 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:34:58,743 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:34:58,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 20:34:58,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:34:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 20:34:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 20:34:58,760 INFO L87 Difference]: Start difference. First operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 20:34:58,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:34:58,776 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2022-03-15 20:34:58,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 20:34:58,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-03-15 20:34:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:34:58,781 INFO L225 Difference]: With dead ends: 16 [2022-03-15 20:34:58,781 INFO L226 Difference]: Without dead ends: 16 [2022-03-15 20:34:58,782 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 20:34:58,784 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:34:58,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:34:58,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-03-15 20:34:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-03-15 20:34:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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) [2022-03-15 20:34:58,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-15 20:34:58,804 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 7 [2022-03-15 20:34:58,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:34:58,804 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-15 20:34:58,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 20:34:58,804 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-15 20:34:58,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 20:34:58,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:34:58,805 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2022-03-15 20:34:58,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 20:34:58,805 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-03-15 20:34:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:34:58,806 INFO L85 PathProgramCache]: Analyzing trace with hash -255250930, now seen corresponding path program 1 times [2022-03-15 20:34:58,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:34:58,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221390055] [2022-03-15 20:34:58,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:34:58,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:34:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:34:58,819 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-15 20:34:58,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:34:58,848 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-15 20:34:58,848 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-03-15 20:34:58,849 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (1 of 2 remaining) [2022-03-15 20:34:58,850 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 2 remaining) [2022-03-15 20:34:58,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 20:34:58,852 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-03-15 20:34:58,855 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 20:34:58,855 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 20:34:58,864 INFO L202 PluginConnector]: Adding new model fork_unchanged_local_variables2.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 08:34:58 BasicIcfg [2022-03-15 20:34:58,865 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 20:34:58,865 INFO L158 Benchmark]: Toolchain (without parser) took 919.71ms. Allocated memory was 181.4MB in the beginning and 233.8MB in the end (delta: 52.4MB). Free memory was 143.9MB in the beginning and 199.9MB in the end (delta: -56.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:34:58,866 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.23ms. Allocated memory is still 181.4MB. Free memory is still 144.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:34:58,866 INFO L158 Benchmark]: Boogie Procedure Inliner took 17.88ms. Allocated memory is still 181.4MB. Free memory was 143.8MB in the beginning and 142.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:34:58,866 INFO L158 Benchmark]: Boogie Preprocessor took 11.51ms. Allocated memory is still 181.4MB. Free memory was 142.3MB in the beginning and 141.4MB in the end (delta: 862.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:34:58,867 INFO L158 Benchmark]: RCFGBuilder took 177.61ms. Allocated memory is still 181.4MB. Free memory was 141.3MB in the beginning and 133.2MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 20:34:58,867 INFO L158 Benchmark]: TraceAbstraction took 704.58ms. Allocated memory was 181.4MB in the beginning and 233.8MB in the end (delta: 52.4MB). Free memory was 132.7MB in the beginning and 199.9MB in the end (delta: -67.2MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:34:58,869 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 0.23ms. Allocated memory is still 181.4MB. Free memory is still 144.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 17.88ms. Allocated memory is still 181.4MB. Free memory was 143.8MB in the beginning and 142.3MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.51ms. Allocated memory is still 181.4MB. Free memory was 142.3MB in the beginning and 141.4MB in the end (delta: 862.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 177.61ms. Allocated memory is still 181.4MB. Free memory was 141.3MB in the beginning and 133.2MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 704.58ms. Allocated memory was 181.4MB in the beginning and 233.8MB in the end (delta: 52.4MB). Free memory was 132.7MB in the beginning and 199.9MB in the end (delta: -67.2MB). 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: 0.2s, 18 PlacesBefore, 13 PlacesAfterwards, 16 TransitionsBefore, 10 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 2 FixpointIterations, 4 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 2 TrivialYvCompositions, 0 ConcurrentYvCompositions, 1 ChoiceCompositions, 8 TotalNumberOfCompositions, 8 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8, positive: 8, positive conditional: 0, positive unconditional: 8, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2, unknown conditional: 0, unknown unconditional: 2] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 25]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 res := 0; [L18] 0 x := 0; VAL [res=0, x=0] [L20] COND TRUE 0 x < 3 VAL [res=0, x=0] [L21] FORK 0 fork x foo(); VAL [res=0, x=0] [L35] 1 res := y; [L22] 0 resOld := res; VAL [res=0, res=0, resOld=0, x=0, y=0] [L23] JOIN 1 join x assign res; VAL [res=0, res=0, resOld=0, x=0, y=0] [L24] COND FALSE 0 !(x > 0) [L27] 0 x := x + 1; VAL [res=0, res=0, resOld=0, x=1, y=0] [L20] COND TRUE 0 x < 3 VAL [res=0, res=0, resOld=0, x=1, y=0] [L21] FORK 0 fork x foo(); VAL [res=0, resOld=0, x=1] [L35] 1 res := y; [L22] 0 resOld := res; VAL [res=2, res=0, resOld=0, x=1, y=2] [L23] JOIN 1 join x assign res; VAL [res=2, res=2, resOld=0, x=1, y=2] [L24] COND TRUE 0 x > 0 [L25] 0 assert resOld == res; VAL [res=2, res=2, resOld=0, x=1, y=2] - UnprovableResult [Line: 21]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 2 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13 IncrementalHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 1 mSDtfsCounter, 13 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=16occurred in iteration=1, 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, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 18 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 20:34:58,919 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...