/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/example1.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 20:34:31,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 20:34:31,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 20:34:31,395 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 20:34:31,396 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 20:34:31,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 20:34:31,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 20:34:31,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 20:34:31,405 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 20:34:31,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 20:34:31,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 20:34:31,415 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 20:34:31,416 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 20:34:31,416 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 20:34:31,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 20:34:31,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 20:34:31,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 20:34:31,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 20:34:31,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 20:34:31,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 20:34:31,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 20:34:31,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 20:34:31,429 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 20:34:31,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 20:34:31,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-15 20:34:31,436 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-15 20:34:31,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-15 20:34:31,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-15 20:34:31,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-15 20:34:31,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-03-15 20:34:31,439 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-03-15 20:34:31,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-03-15 20:34:31,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-03-15 20:34:31,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-03-15 20:34:31,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-03-15 20:34:31,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-03-15 20:34:31,443 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-03-15 20:34:31,443 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-03-15 20:34:31,444 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 20:34:31,444 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 20:34:31,445 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 20:34:31,446 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 20:34:31,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 20:34:31,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 20:34:31,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 20:34:31,476 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 20:34:31,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 20:34:31,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 20:34:31,477 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 20:34:31,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 20:34:31,477 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 20:34:31,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 20:34:31,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 20:34:31,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 20:34:31,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 20:34:31,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 20:34:31,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 20:34:31,479 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 20:34:31,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 20:34:31,479 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 20:34:31,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 20:34:31,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 20:34:31,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 20:34:31,480 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 20:34:31,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 20:34:31,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:34:31,480 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 20:34:31,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 20:34:31,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 20:34:31,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 20:34:31,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 20:34:31,481 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 20:34:31,481 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 20:34:31,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 20:34:31,481 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 20:34:31,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 20:34:31,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 20:34:31,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 20:34:31,703 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 20:34:31,706 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 20:34:31,707 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example1.bpl [2022-03-15 20:34:31,707 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/example1.bpl' [2022-03-15 20:34:31,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 20:34:31,731 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 20:34:31,732 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 20:34:31,732 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 20:34:31,733 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 20:34:31,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/1) ... [2022-03-15 20:34:31,747 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/1) ... [2022-03-15 20:34:31,753 INFO L137 Inliner]: procedures = 3, calls = 1, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 20:34:31,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 20:34:31,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 20:34:31,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 20:34:31,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 20:34:31,762 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/1) ... [2022-03-15 20:34:31,762 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/1) ... [2022-03-15 20:34:31,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/1) ... [2022-03-15 20:34:31,763 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/1) ... [2022-03-15 20:34:31,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/1) ... [2022-03-15 20:34:31,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/1) ... [2022-03-15 20:34:31,765 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/1) ... [2022-03-15 20:34:31,766 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 20:34:31,768 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 20:34:31,768 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 20:34:31,768 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 20:34:31,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/1) ... [2022-03-15 20:34:31,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:34:31,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:34:31,805 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 20:34:31,819 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 20:34:31,842 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2022-03-15 20:34:31,842 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2022-03-15 20:34:31,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 20:34:31,842 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 20:34:31,843 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 20:34:31,883 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 20:34:31,884 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 20:34:31,918 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 20:34:31,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 20:34:31,923 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 20:34:31,924 INFO L202 PluginConnector]: Adding new model example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:34:31 BoogieIcfgContainer [2022-03-15 20:34:31,924 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 20:34:31,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 20:34:31,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 20:34:31,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 20:34:31,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example1.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:31" (1/2) ... [2022-03-15 20:34:31,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c806122 and model type example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 08:34:31, skipping insertion in model container [2022-03-15 20:34:31,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:34:31" (2/2) ... [2022-03-15 20:34:31,931 INFO L111 eAbstractionObserver]: Analyzing ICFG example1.bpl [2022-03-15 20:34:31,935 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 20:34:31,935 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 20:34:31,935 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 20:34:31,935 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 20:34:31,952 INFO L148 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-03-15 20:34:31,988 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 20:34:31,994 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 20:34:31,994 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-03-15 20:34:32,003 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 20:34:32,011 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 15 places, 11 transitions, 30 flow [2022-03-15 20:34:32,013 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 15 places, 11 transitions, 30 flow [2022-03-15 20:34:32,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 15 places, 11 transitions, 30 flow [2022-03-15 20:34:32,034 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2022-03-15 20:34:32,034 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-03-15 20:34:32,036 INFO L84 FinitePrefix]: Finished finitePrefix Result has 15 conditions, 10 events. 0/10 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 3 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 20:34:32,037 INFO L116 LiptonReduction]: Number of co-enabled transitions 4 [2022-03-15 20:34:32,099 INFO L131 LiptonReduction]: Checked pairs total: 9 [2022-03-15 20:34:32,099 INFO L133 LiptonReduction]: Total number of compositions: 4 [2022-03-15 20:34:32,123 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 12 places, 8 transitions, 24 flow [2022-03-15 20:34:32,131 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 20:34:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 20:34:32,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-03-15 20:34:32,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:34:32,137 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-03-15 20:34:32,140 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION] === [2022-03-15 20:34:32,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:34:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1195599129, now seen corresponding path program 1 times [2022-03-15 20:34:32,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:34:32,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120298155] [2022-03-15 20:34:32,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:34:32,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:34:32,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:34:32,271 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-15 20:34:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:34:32,287 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-15 20:34:32,289 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-03-15 20:34:32,289 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (1 of 2 remaining) [2022-03-15 20:34:32,291 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (0 of 2 remaining) [2022-03-15 20:34:32,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 20:34:32,293 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2022-03-15 20:34:32,297 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 20:34:32,297 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 20:34:32,304 INFO L202 PluginConnector]: Adding new model example1.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 08:34:32 BasicIcfg [2022-03-15 20:34:32,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 20:34:32,305 INFO L158 Benchmark]: Toolchain (without parser) took 574.28ms. Allocated memory is still 199.2MB. Free memory was 159.3MB in the beginning and 163.3MB in the end (delta: -3.9MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:34:32,306 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 199.2MB. Free memory is still 160.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:34:32,306 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.31ms. Allocated memory is still 199.2MB. Free memory was 159.3MB in the beginning and 157.8MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 20:34:32,307 INFO L158 Benchmark]: Boogie Preprocessor took 11.76ms. Allocated memory is still 199.2MB. Free memory was 157.7MB in the beginning and 156.9MB in the end (delta: 823.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:34:32,307 INFO L158 Benchmark]: RCFGBuilder took 155.99ms. Allocated memory is still 199.2MB. Free memory was 156.9MB in the beginning and 149.5MB in the end (delta: 7.3MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-03-15 20:34:32,308 INFO L158 Benchmark]: TraceAbstraction took 378.49ms. Allocated memory is still 199.2MB. Free memory was 149.1MB in the beginning and 163.3MB in the end (delta: -14.2MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:34:32,310 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 199.2MB. Free memory is still 160.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.31ms. Allocated memory is still 199.2MB. Free memory was 159.3MB in the beginning and 157.8MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.76ms. Allocated memory is still 199.2MB. Free memory was 157.7MB in the beginning and 156.9MB in the end (delta: 823.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 155.99ms. Allocated memory is still 199.2MB. Free memory was 156.9MB in the beginning and 149.5MB in the end (delta: 7.3MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 378.49ms. Allocated memory is still 199.2MB. Free memory was 149.1MB in the beginning and 163.3MB in the end (delta: -14.2MB). 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: 0.1s, 15 PlacesBefore, 12 PlacesAfterwards, 11 TransitionsBefore, 8 TransitionsAfterwards, 4 CoEnabledTransitionPairs, 2 FixpointIterations, 3 TrivialSequentialCompositions, 1 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 9 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 8, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 6, negative conditional: 0, negative unconditional: 6, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 8, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 4, negative conditional: 0, negative unconditional: 4, unknown: 3, unknown conditional: 0, unknown unconditional: 3] , Statistics on independence cache: Total cache size (in pairs): 1, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - 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: 26]: assertion can be violated assertion can be violated We found a FailurePath: [L20] 0 x := 1; VAL [x=1] [L21] FORK 0 fork 1 foo(); VAL [x=1] [L22] 0 n := 2; VAL [n=2, x=1] [L34] 1 n := 1; [L24] JOIN 1 join x; VAL [n=1, x=1] [L25] 0 x := 4; [L26] 0 assert false; VAL [n=1, x=4] - 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, 16 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=8occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-03-15 20:34:32,336 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...