/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/weaver-benchmarks/generated/test/easy6.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 22:27:04,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 22:27:04,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 22:27:04,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 22:27:04,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 22:27:04,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 22:27:04,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 22:27:04,738 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 22:27:04,763 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 22:27:04,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 22:27:04,764 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 22:27:04,764 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 22:27:04,764 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 22:27:04,764 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 22:27:04,764 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 22:27:04,764 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 22:27:04,764 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 22:27:04,765 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 22:27:04,765 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 22:27:04,766 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 22:27:04,766 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 22:27:04,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 22:27:04,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 22:27:04,766 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 22:27:04,766 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 22:27:04,766 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 22:27:04,766 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 22:27:04,766 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 22:27:04,766 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 22:27:04,766 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 22:27:04,766 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 22:27:04,954 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 22:27:04,969 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 22:27:04,971 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 22:27:04,972 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 22:27:04,972 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 22:27:04,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl [2022-03-15 22:27:04,973 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/easy6.wvr.bpl' [2022-03-15 22:27:04,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 22:27:04,990 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 22:27:04,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 22:27:04,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 22:27:04,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 22:27:04,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/1) ... [2022-03-15 22:27:05,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/1) ... [2022-03-15 22:27:05,008 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 22:27:05,009 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 22:27:05,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 22:27:05,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 22:27:05,011 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 22:27:05,016 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/1) ... [2022-03-15 22:27:05,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/1) ... [2022-03-15 22:27:05,017 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/1) ... [2022-03-15 22:27:05,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/1) ... [2022-03-15 22:27:05,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/1) ... [2022-03-15 22:27:05,020 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/1) ... [2022-03-15 22:27:05,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/1) ... [2022-03-15 22:27:05,021 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 22:27:05,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 22:27:05,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 22:27:05,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 22:27:05,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/1) ... [2022-03-15 22:27:05,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 22:27:05,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:05,048 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 22:27:05,054 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 22:27:05,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 22:27:05,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 22:27:05,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 22:27:05,073 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 22:27:05,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 22:27:05,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 22:27:05,073 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 22:27:05,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 22:27:05,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 22:27:05,073 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 22:27:05,105 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 22:27:05,106 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 22:27:05,226 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 22:27:05,231 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 22:27:05,231 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 22:27:05,232 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 10:27:05 BoogieIcfgContainer [2022-03-15 22:27:05,232 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 22:27:05,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 22:27:05,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 22:27:05,236 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 22:27:05,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:27:04" (1/2) ... [2022-03-15 22:27:05,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3382b565 and model type easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 10:27:05, skipping insertion in model container [2022-03-15 22:27:05,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 10:27:05" (2/2) ... [2022-03-15 22:27:05,237 INFO L111 eAbstractionObserver]: Analyzing ICFG easy6.wvr.bpl [2022-03-15 22:27:05,240 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 22:27:05,241 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 22:27:05,241 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 22:27:05,241 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 22:27:05,289 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 22:27:05,340 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 22:27:05,345 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 22:27:05,345 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 22:27:05,377 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 22:27:05,383 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 42 places, 35 transitions, 86 flow [2022-03-15 22:27:05,385 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 42 places, 35 transitions, 86 flow [2022-03-15 22:27:05,386 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 42 places, 35 transitions, 86 flow [2022-03-15 22:27:05,415 INFO L129 PetriNetUnfolder]: 0/33 cut-off events. [2022-03-15 22:27:05,415 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 22:27:05,416 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 0/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/32 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2022-03-15 22:27:05,417 INFO L116 LiptonReduction]: Number of co-enabled transitions 240 [2022-03-15 22:27:05,581 INFO L131 LiptonReduction]: Checked pairs total: 1454 [2022-03-15 22:27:05,581 INFO L133 LiptonReduction]: Total number of compositions: 9 [2022-03-15 22:27:05,587 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 34 places, 27 transitions, 70 flow [2022-03-15 22:27:05,604 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 124 states, 123 states have (on average 1.8048780487804879) internal successors, (222), 123 states have internal predecessors, (222), 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 22:27:05,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 124 states, 123 states have (on average 1.8048780487804879) internal successors, (222), 123 states have internal predecessors, (222), 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 22:27:05,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:27:05,610 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:05,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:05,613 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:05,616 INFO L85 PathProgramCache]: Analyzing trace with hash 2002724196, now seen corresponding path program 1 times [2022-03-15 22:27:05,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:05,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717113557] [2022-03-15 22:27:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:05,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:05,774 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 22:27:05,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:05,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717113557] [2022-03-15 22:27:05,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717113557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:27:05,776 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:27:05,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 22:27:05,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1869159366] [2022-03-15 22:27:05,777 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:05,780 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:05,809 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 68 transitions. [2022-03-15 22:27:05,809 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:06,116 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:27:06,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 22:27:06,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 22:27:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-15 22:27:06,139 INFO L87 Difference]: Start difference. First operand has 124 states, 123 states have (on average 1.8048780487804879) internal successors, (222), 123 states have internal predecessors, (222), 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 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 22:27:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:06,263 INFO L93 Difference]: Finished difference Result 152 states and 256 transitions. [2022-03-15 22:27:06,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 22:27:06,267 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 24 [2022-03-15 22:27:06,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:06,272 INFO L225 Difference]: With dead ends: 152 [2022-03-15 22:27:06,272 INFO L226 Difference]: Without dead ends: 119 [2022-03-15 22:27:06,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 22:27:06,275 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:06,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 117 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:27:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-15 22:27:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2022-03-15 22:27:06,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.76) internal successors, (176), 100 states have internal predecessors, (176), 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 22:27:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 176 transitions. [2022-03-15 22:27:06,311 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 176 transitions. Word has length 24 [2022-03-15 22:27:06,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:06,311 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 176 transitions. [2022-03-15 22:27:06,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 22:27:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 176 transitions. [2022-03-15 22:27:06,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:27:06,312 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:06,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:06,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 22:27:06,313 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:06,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:06,313 INFO L85 PathProgramCache]: Analyzing trace with hash 784001516, now seen corresponding path program 2 times [2022-03-15 22:27:06,315 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:06,315 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908085649] [2022-03-15 22:27:06,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:06,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:06,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:06,376 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 22:27:06,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:06,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908085649] [2022-03-15 22:27:06,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908085649] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:27:06,377 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:27:06,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 22:27:06,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [832960977] [2022-03-15 22:27:06,377 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:06,379 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:06,381 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 65 transitions. [2022-03-15 22:27:06,381 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:06,545 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [670#(or (not (<= n1 n2)) (<= 1 n1)), 671#(or (<= 0 tmp1) (not (<= (+ tmp1 1) n2))), 669#(and (or (<= n1 tmp2) (not (<= n1 n2))) (or (<= n1 tmp2) (not (= n2 0))) (or (not (<= n1 n2)) (<= 1 n1)))] [2022-03-15 22:27:06,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 22:27:06,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 22:27:06,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 22:27:06,548 INFO L87 Difference]: Start difference. First operand 101 states and 176 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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 22:27:06,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:06,677 INFO L93 Difference]: Finished difference Result 174 states and 295 transitions. [2022-03-15 22:27:06,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:27:06,677 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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 24 [2022-03-15 22:27:06,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:06,678 INFO L225 Difference]: With dead ends: 174 [2022-03-15 22:27:06,678 INFO L226 Difference]: Without dead ends: 139 [2022-03-15 22:27:06,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2022-03-15 22:27:06,679 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:06,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 158 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:27:06,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-15 22:27:06,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 86. [2022-03-15 22:27:06,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.7176470588235293) internal successors, (146), 85 states have internal predecessors, (146), 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 22:27:06,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 146 transitions. [2022-03-15 22:27:06,695 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 146 transitions. Word has length 24 [2022-03-15 22:27:06,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:06,695 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 146 transitions. [2022-03-15 22:27:06,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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 22:27:06,696 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 146 transitions. [2022-03-15 22:27:06,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:27:06,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:06,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:06,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 22:27:06,696 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:06,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:06,697 INFO L85 PathProgramCache]: Analyzing trace with hash -624479292, now seen corresponding path program 3 times [2022-03-15 22:27:06,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:06,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244740974] [2022-03-15 22:27:06,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:06,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:06,718 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 22:27:06,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:06,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244740974] [2022-03-15 22:27:06,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244740974] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:27:06,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:27:06,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 22:27:06,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [705898226] [2022-03-15 22:27:06,718 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:06,719 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:06,721 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 55 transitions. [2022-03-15 22:27:06,721 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:06,754 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:27:06,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 22:27:06,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:06,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 22:27:06,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 22:27:06,755 INFO L87 Difference]: Start difference. First operand 86 states and 146 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 22:27:06,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:06,769 INFO L93 Difference]: Finished difference Result 80 states and 134 transitions. [2022-03-15 22:27:06,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 22:27:06,770 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 24 [2022-03-15 22:27:06,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:06,770 INFO L225 Difference]: With dead ends: 80 [2022-03-15 22:27:06,770 INFO L226 Difference]: Without dead ends: 80 [2022-03-15 22:27:06,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 22:27:06,772 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:06,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:27:06,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-03-15 22:27:06,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-03-15 22:27:06,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 79 states have internal predecessors, (134), 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 22:27:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 134 transitions. [2022-03-15 22:27:06,776 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 134 transitions. Word has length 24 [2022-03-15 22:27:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:06,776 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 134 transitions. [2022-03-15 22:27:06,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 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 22:27:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 134 transitions. [2022-03-15 22:27:06,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:27:06,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:06,777 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:06,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 22:27:06,777 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:06,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1010424802, now seen corresponding path program 4 times [2022-03-15 22:27:06,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:06,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048774446] [2022-03-15 22:27:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:06,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:06,836 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 22:27:06,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:06,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048774446] [2022-03-15 22:27:06,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048774446] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:27:06,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:27:06,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-15 22:27:06,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2110847978] [2022-03-15 22:27:06,837 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:06,838 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:06,840 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 68 transitions. [2022-03-15 22:27:06,840 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:06,988 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:27:06,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 22:27:06,988 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:06,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 22:27:06,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-03-15 22:27:06,990 INFO L87 Difference]: Start difference. First operand 80 states and 134 transitions. Second operand has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 22:27:07,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:07,047 INFO L93 Difference]: Finished difference Result 97 states and 154 transitions. [2022-03-15 22:27:07,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 22:27:07,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 24 [2022-03-15 22:27:07,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:07,049 INFO L225 Difference]: With dead ends: 97 [2022-03-15 22:27:07,049 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 22:27:07,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-15 22:27:07,054 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:07,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 109 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:27:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 22:27:07,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2022-03-15 22:27:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 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 22:27:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 106 transitions. [2022-03-15 22:27:07,061 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 106 transitions. Word has length 24 [2022-03-15 22:27:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:07,061 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 106 transitions. [2022-03-15 22:27:07,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.0) internal successors, (30), 6 states have internal predecessors, (30), 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 22:27:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 106 transitions. [2022-03-15 22:27:07,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:27:07,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:07,063 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:07,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 22:27:07,063 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:07,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:07,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1642754762, now seen corresponding path program 5 times [2022-03-15 22:27:07,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:07,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965041798] [2022-03-15 22:27:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:07,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:07,135 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 22:27:07,135 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:07,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965041798] [2022-03-15 22:27:07,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965041798] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:27:07,136 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:27:07,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-15 22:27:07,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [978481787] [2022-03-15 22:27:07,136 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:07,137 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:07,139 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 71 transitions. [2022-03-15 22:27:07,139 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:07,346 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1527#(and (<= 0 tmp2) (<= 0 n2)), 1530#(and (<= 1 n2) (<= 0 tmp1)), 1528#(and (not (= n1 0)) (not (< n2 n1))), 1529#(and (or (<= 1 n2) (not (< n2 n1))) (not (= n1 0)))] [2022-03-15 22:27:07,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:27:07,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:07,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:27:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-03-15 22:27:07,347 INFO L87 Difference]: Start difference. First operand 66 states and 106 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 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 22:27:07,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:07,481 INFO L93 Difference]: Finished difference Result 106 states and 168 transitions. [2022-03-15 22:27:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:27:07,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 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 24 [2022-03-15 22:27:07,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:07,481 INFO L225 Difference]: With dead ends: 106 [2022-03-15 22:27:07,482 INFO L226 Difference]: Without dead ends: 86 [2022-03-15 22:27:07,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2022-03-15 22:27:07,482 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 155 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:07,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 138 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:27:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-15 22:27:07,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2022-03-15 22:27:07,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 66 states have internal predecessors, (105), 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 22:27:07,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 105 transitions. [2022-03-15 22:27:07,485 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 105 transitions. Word has length 24 [2022-03-15 22:27:07,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:07,486 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 105 transitions. [2022-03-15 22:27:07,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 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 22:27:07,486 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 105 transitions. [2022-03-15 22:27:07,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:27:07,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:07,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:07,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 22:27:07,487 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:07,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:07,487 INFO L85 PathProgramCache]: Analyzing trace with hash -180297960, now seen corresponding path program 6 times [2022-03-15 22:27:07,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:07,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650997236] [2022-03-15 22:27:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:07,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:07,511 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 22:27:07,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:07,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650997236] [2022-03-15 22:27:07,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650997236] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:27:07,511 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:27:07,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 22:27:07,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [626052943] [2022-03-15 22:27:07,512 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:07,512 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:07,514 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 55 transitions. [2022-03-15 22:27:07,514 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:07,556 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:27:07,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 22:27:07,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:07,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 22:27:07,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 22:27:07,557 INFO L87 Difference]: Start difference. First operand 67 states and 105 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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 22:27:07,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:07,567 INFO L93 Difference]: Finished difference Result 66 states and 100 transitions. [2022-03-15 22:27:07,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 22:27:07,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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) Word has length 24 [2022-03-15 22:27:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:07,568 INFO L225 Difference]: With dead ends: 66 [2022-03-15 22:27:07,568 INFO L226 Difference]: Without dead ends: 60 [2022-03-15 22:27:07,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 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 22:27:07,569 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:07,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:27:07,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-15 22:27:07,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-03-15 22:27:07,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 59 states have internal predecessors, (91), 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 22:27:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 91 transitions. [2022-03-15 22:27:07,575 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 91 transitions. Word has length 24 [2022-03-15 22:27:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:07,575 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 91 transitions. [2022-03-15 22:27:07,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 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 22:27:07,575 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 91 transitions. [2022-03-15 22:27:07,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:27:07,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:07,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:07,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-15 22:27:07,576 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:07,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash 659328816, now seen corresponding path program 7 times [2022-03-15 22:27:07,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:07,579 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317642436] [2022-03-15 22:27:07,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:07,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:07,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:07,624 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 22:27:07,624 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:07,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317642436] [2022-03-15 22:27:07,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317642436] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:27:07,625 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:27:07,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-15 22:27:07,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [447126793] [2022-03-15 22:27:07,625 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:07,626 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:07,628 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 67 transitions. [2022-03-15 22:27:07,628 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:07,765 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1984#(and (or (<= 1 n2) (not (< n2 n1))) (not (= n1 0))), 1983#(and (not (= n1 0)) (not (< n2 n1)))] [2022-03-15 22:27:07,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:27:07,765 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:07,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:27:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:27:07,766 INFO L87 Difference]: Start difference. First operand 60 states and 91 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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 22:27:07,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:07,803 INFO L93 Difference]: Finished difference Result 39 states and 58 transitions. [2022-03-15 22:27:07,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 22:27:07,804 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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 24 [2022-03-15 22:27:07,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:07,805 INFO L225 Difference]: With dead ends: 39 [2022-03-15 22:27:07,805 INFO L226 Difference]: Without dead ends: 0 [2022-03-15 22:27:07,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-15 22:27:07,807 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:07,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:27:07,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-15 22:27:07,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-15 22:27:07,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 22:27:07,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-15 22:27:07,808 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2022-03-15 22:27:07,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:07,808 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-15 22:27:07,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 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 22:27:07,809 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-15 22:27:07,809 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-15 22:27:07,810 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 22:27:07,811 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 22:27:07,811 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 22:27:07,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 22:27:07,814 INFO L732 BasicCegarLoop]: Path program histogram: [7] [2022-03-15 22:27:07,823 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 22:27:07,823 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 22:27:07,825 INFO L202 PluginConnector]: Adding new model easy6.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 10:27:07 BasicIcfg [2022-03-15 22:27:07,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 22:27:07,825 INFO L158 Benchmark]: Toolchain (without parser) took 2835.05ms. Allocated memory was 181.4MB in the beginning and 246.4MB in the end (delta: 65.0MB). Free memory was 145.9MB in the beginning and 164.4MB in the end (delta: -18.6MB). Peak memory consumption was 46.9MB. Max. memory is 8.0GB. [2022-03-15 22:27:07,825 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 181.4MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 22:27:07,825 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.83ms. Allocated memory is still 181.4MB. Free memory was 145.8MB in the beginning and 144.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-15 22:27:07,826 INFO L158 Benchmark]: Boogie Preprocessor took 10.09ms. Allocated memory is still 181.4MB. Free memory was 144.3MB in the beginning and 143.4MB in the end (delta: 854.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:27:07,826 INFO L158 Benchmark]: RCFGBuilder took 211.18ms. Allocated memory is still 181.4MB. Free memory was 143.3MB in the beginning and 134.5MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 22:27:07,826 INFO L158 Benchmark]: TraceAbstraction took 2591.32ms. Allocated memory was 181.4MB in the beginning and 246.4MB in the end (delta: 65.0MB). Free memory was 134.0MB in the beginning and 164.4MB in the end (delta: -30.4MB). Peak memory consumption was 34.3MB. Max. memory is 8.0GB. [2022-03-15 22:27:07,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.09ms. Allocated memory is still 181.4MB. Free memory is still 146.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.83ms. Allocated memory is still 181.4MB. Free memory was 145.8MB in the beginning and 144.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 10.09ms. Allocated memory is still 181.4MB. Free memory was 144.3MB in the beginning and 143.4MB in the end (delta: 854.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 211.18ms. Allocated memory is still 181.4MB. Free memory was 143.3MB in the beginning and 134.5MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 2591.32ms. Allocated memory was 181.4MB in the beginning and 246.4MB in the end (delta: 65.0MB). Free memory was 134.0MB in the beginning and 164.4MB in the end (delta: -30.4MB). Peak memory consumption was 34.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 42 PlacesBefore, 34 PlacesAfterwards, 35 TransitionsBefore, 27 TransitionsAfterwards, 240 CoEnabledTransitionPairs, 3 FixpointIterations, 7 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 9 TotalNumberOfCompositions, 1454 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 611, positive: 475, positive conditional: 0, positive unconditional: 475, negative: 136, negative conditional: 0, negative unconditional: 136, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 97, positive: 81, positive conditional: 0, positive unconditional: 81, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 611, positive: 394, positive conditional: 0, positive unconditional: 394, negative: 120, negative conditional: 0, negative unconditional: 120, unknown: 97, unknown conditional: 0, unknown unconditional: 97] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 59, Positive conditional cache size: 0, Positive unconditional cache size: 59, Negative cache size: 13, Negative conditional cache size: 0, Negative unconditional cache size: 13 - 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 - PositiveResult [Line: 60]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 60 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 7, TraceHistogramMax: 1, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 386 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 386 mSDsluCounter, 624 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 652 mSDsCounter, 42 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 546 IncrementalHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 42 mSolverCounterUnsat, 163 mSDtfsCounter, 546 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 196 GetRequests, 125 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=0, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 98 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 161 ConstructedInterpolants, 0 QuantifiedInterpolants, 658 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-15 22:27:07,852 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...