/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/ThreadIdTest-Unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 20:34:19,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 20:34:19,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 20:34:20,035 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 20:34:20,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 20:34:20,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 20:34:20,097 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 20:34:20,103 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 20:34:20,136 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 20:34:20,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 20:34:20,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 20:34:20,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 20:34:20,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 20:34:20,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 20:34:20,138 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 20:34:20,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 20:34:20,139 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 20:34:20,139 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 20:34:20,139 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 20:34:20,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 20:34:20,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 20:34:20,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 20:34:20,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 20:34:20,140 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 20:34:20,140 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 20:34:20,140 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 20:34:20,140 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 20:34:20,140 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 20:34:20,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 20:34:20,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 20:34:20,141 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 20:34:20,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:34:20,141 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 20:34:20,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 20:34:20,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 20:34:20,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 20:34:20,142 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 20:34:20,142 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 20:34:20,142 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 20:34:20,142 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 20:34:20,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 20:34:20,357 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 20:34:20,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 20:34:20,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 20:34:20,379 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 20:34:20,384 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 20:34:20,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl [2022-03-15 20:34:20,385 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/ThreadIdTest-Unsafe.bpl' [2022-03-15 20:34:20,404 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 20:34:20,406 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 20:34:20,407 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 20:34:20,407 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 20:34:20,407 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 20:34:20,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/1) ... [2022-03-15 20:34:20,423 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/1) ... [2022-03-15 20:34:20,428 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 20:34:20,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 20:34:20,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 20:34:20,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 20:34:20,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 20:34:20,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/1) ... [2022-03-15 20:34:20,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/1) ... [2022-03-15 20:34:20,438 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/1) ... [2022-03-15 20:34:20,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/1) ... [2022-03-15 20:34:20,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/1) ... [2022-03-15 20:34:20,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/1) ... [2022-03-15 20:34:20,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/1) ... [2022-03-15 20:34:20,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 20:34:20,444 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 20:34:20,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 20:34:20,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 20:34:20,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/1) ... [2022-03-15 20:34:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 20:34:20,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 20:34:20,481 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 20:34:20,504 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 20:34:20,522 INFO L130 BoogieDeclarations]: Found specification of procedure decrement [2022-03-15 20:34:20,522 INFO L138 BoogieDeclarations]: Found implementation of procedure decrement [2022-03-15 20:34:20,522 INFO L130 BoogieDeclarations]: Found specification of procedure increment [2022-03-15 20:34:20,522 INFO L138 BoogieDeclarations]: Found implementation of procedure increment [2022-03-15 20:34:20,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 20:34:20,522 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 20:34:20,523 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 20:34:20,560 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 20:34:20,561 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 20:34:20,618 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 20:34:20,625 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 20:34:20,625 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 20:34:20,629 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:34:20 BoogieIcfgContainer [2022-03-15 20:34:20,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 20:34:20,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 20:34:20,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 20:34:20,633 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 20:34:20,633 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 08:34:20" (1/2) ... [2022-03-15 20:34:20,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41177d41 and model type ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 08:34:20, skipping insertion in model container [2022-03-15 20:34:20,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 08:34:20" (2/2) ... [2022-03-15 20:34:20,637 INFO L111 eAbstractionObserver]: Analyzing ICFG ThreadIdTest-Unsafe.bpl [2022-03-15 20:34:20,640 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 20:34:20,641 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 20:34:20,641 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 20:34:20,641 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 20:34:20,666 WARN L322 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:20,667 WARN L322 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:20,668 WARN L322 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:20,668 WARN L322 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:20,673 WARN L322 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:20,673 WARN L322 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:20,674 WARN L322 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_n not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:20,674 WARN L322 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:20,679 WARN L322 ript$VariableManager]: TermVariabe incrementThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:20,683 WARN L322 ript$VariableManager]: TermVariabe decrementThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2022-03-15 20:34:20,687 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 20:34:20,745 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 20:34:20,752 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 20:34:20,752 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 20:34:20,762 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 20:34:20,771 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 14 transitions, 44 flow [2022-03-15 20:34:20,774 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 14 transitions, 44 flow [2022-03-15 20:34:20,776 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 14 transitions, 44 flow [2022-03-15 20:34:20,800 INFO L129 PetriNetUnfolder]: 0/15 cut-off events. [2022-03-15 20:34:20,801 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 20:34:20,802 INFO L84 FinitePrefix]: Finished finitePrefix Result has 24 conditions, 15 events. 0/15 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 17 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-03-15 20:34:20,804 INFO L116 LiptonReduction]: Number of co-enabled transitions 44 [2022-03-15 20:34:20,847 INFO L131 LiptonReduction]: Checked pairs total: 33 [2022-03-15 20:34:20,848 INFO L133 LiptonReduction]: Total number of compositions: 3 [2022-03-15 20:34:20,854 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 11 transitions, 38 flow [2022-03-15 20:34:20,865 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 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 20:34:20,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 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 20:34:20,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-03-15 20:34:20,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:34:20,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-03-15 20:34:20,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:34:20,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:34:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1314288572, now seen corresponding path program 1 times [2022-03-15 20:34:20,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:34:20,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237395004] [2022-03-15 20:34:20,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:34:20,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:34:20,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 20:34:21,035 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 20:34:21,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 20:34:21,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237395004] [2022-03-15 20:34:21,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237395004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 20:34:21,036 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 20:34:21,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 20:34:21,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [131195270] [2022-03-15 20:34:21,038 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 20:34:21,039 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 20:34:21,045 INFO L252 McrAutomatonBuilder]: Finished intersection with 8 states and 8 transitions. [2022-03-15 20:34:21,046 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 20:34:21,068 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 20:34:21,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 20:34:21,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 20:34:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 20:34:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 20:34:21,122 INFO L87 Difference]: Start difference. First operand has 20 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 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, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 20:34:21,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 20:34:21,135 INFO L93 Difference]: Finished difference Result 14 states and 18 transitions. [2022-03-15 20:34:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 20:34:21,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-03-15 20:34:21,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 20:34:21,148 INFO L225 Difference]: With dead ends: 14 [2022-03-15 20:34:21,148 INFO L226 Difference]: Without dead ends: 12 [2022-03-15 20:34:21,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 20:34:21,151 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 20:34:21,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 3 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 20:34:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-03-15 20:34:21,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-03-15 20:34:21,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 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 20:34:21,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-03-15 20:34:21,171 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 6 [2022-03-15 20:34:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 20:34:21,171 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-03-15 20:34:21,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 20:34:21,172 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-03-15 20:34:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-03-15 20:34:21,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 20:34:21,172 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-03-15 20:34:21,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 20:34:21,173 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 20:34:21,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 20:34:21,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1314143492, now seen corresponding path program 1 times [2022-03-15 20:34:21,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 20:34:21,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772256158] [2022-03-15 20:34:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 20:34:21,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 20:34:21,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:34:21,184 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-15 20:34:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-15 20:34:21,200 INFO L138 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-15 20:34:21,200 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-03-15 20:34:21,202 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 20:34:21,203 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 20:34:21,204 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 20:34:21,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 20:34:21,206 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-03-15 20:34:21,209 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 20:34:21,209 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 20:34:21,220 INFO L202 PluginConnector]: Adding new model ThreadIdTest-Unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 08:34:21 BasicIcfg [2022-03-15 20:34:21,220 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 20:34:21,221 INFO L158 Benchmark]: Toolchain (without parser) took 814.75ms. Allocated memory was 185.6MB in the beginning and 246.4MB in the end (delta: 60.8MB). Free memory was 144.6MB in the beginning and 211.8MB in the end (delta: -67.2MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:34:21,221 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 185.6MB. Free memory is still 145.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:34:21,222 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.45ms. Allocated memory is still 185.6MB. Free memory was 144.5MB in the beginning and 142.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 20:34:21,222 INFO L158 Benchmark]: Boogie Preprocessor took 11.53ms. Allocated memory is still 185.6MB. Free memory was 142.9MB in the beginning and 142.1MB in the end (delta: 826.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 20:34:21,223 INFO L158 Benchmark]: RCFGBuilder took 184.77ms. Allocated memory is still 185.6MB. Free memory was 142.0MB in the beginning and 134.3MB in the end (delta: 7.7MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. [2022-03-15 20:34:21,223 INFO L158 Benchmark]: TraceAbstraction took 589.96ms. Allocated memory was 185.6MB in the beginning and 246.4MB in the end (delta: 60.8MB). Free memory was 133.9MB in the beginning and 211.8MB in the end (delta: -78.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 20:34:21,226 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 185.6MB. Free memory is still 145.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.45ms. Allocated memory is still 185.6MB. Free memory was 144.5MB in the beginning and 142.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.53ms. Allocated memory is still 185.6MB. Free memory was 142.9MB in the beginning and 142.1MB in the end (delta: 826.8kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 184.77ms. Allocated memory is still 185.6MB. Free memory was 142.0MB in the beginning and 134.3MB in the end (delta: 7.7MB). Peak memory consumption was 7.3MB. Max. memory is 8.0GB. * TraceAbstraction took 589.96ms. Allocated memory was 185.6MB in the beginning and 246.4MB in the end (delta: 60.8MB). Free memory was 133.9MB in the beginning and 211.8MB in the end (delta: -78.0MB). 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, 20 PlacesBefore, 17 PlacesAfterwards, 14 TransitionsBefore, 11 TransitionsAfterwards, 44 CoEnabledTransitionPairs, 1 FixpointIterations, 0 TrivialSequentialCompositions, 3 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 33 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 33, positive: 33, positive conditional: 0, positive unconditional: 33, 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: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 33, positive: 9, positive conditional: 0, positive unconditional: 9, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 24, unknown conditional: 0, unknown unconditional: 24] , Statistics on independence cache: Total cache size (in pairs): 8, Positive cache size: 8, Positive conditional cache size: 0, Positive unconditional cache size: 8, 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: 22]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 x := 0; VAL [x=0] [L19] FORK 0 fork 1 increment(x); VAL [n=0, x=0] [L20] FORK 0 fork 2 decrement(x); VAL [n=0, n=0, x=0] [L37] 2 res := n - 1; [L21] JOIN 2 join 2 assign y; VAL [n=0, n=0, res=-1, x=0, y=-1] [L22] 0 assert y == 1; VAL [n=0, n=0, res=-1, x=0, y=-1] - UnprovableResult [Line: 19]: 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: 19]: 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, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 2 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred 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, 0.1s InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 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 20:34:21,261 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...