/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/popl20-bad/commit-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:47:07,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:47:07,768 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:47:07,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 21:47:07,811 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 21:47:07,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 21:47:07,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 21:47:07,813 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 21:47:07,814 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 21:47:07,815 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 21:47:07,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 21:47:07,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 21:47:07,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 21:47:07,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 21:47:07,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 21:47:07,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 21:47:07,818 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 21:47:07,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 21:47:07,820 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 21:47:07,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 21:47:07,821 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 21:47:07,825 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 21:47:07,826 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 21:47:07,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 21:47:07,828 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-15 21:47:07,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 21:47:07,840 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 21:47:07,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 21:47:07,842 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 21:47:07,862 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:47:07,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:47:07,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:47:07,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:47:07,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:47:07,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:47:07,864 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:47:07,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:47:07,864 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:47:07,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:47:07,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:47:07,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:47:07,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:47:07,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:47:07,865 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:47:07,865 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:47:07,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:47:07,865 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:47:07,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:47:07,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:47:07,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:47:07,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:47:07,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:47:07,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:47:07,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:47:07,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:47:07,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:47:07,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:47:07,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:47:07,867 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:47:07,867 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:47:07,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:47:07,867 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:47:08,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:47:08,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:47:08,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:47:08,092 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:47:08,092 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:47:08,093 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl [2022-03-15 21:47:08,094 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/commit-1.wvr.bpl' [2022-03-15 21:47:08,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:47:08,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:47:08,119 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:47:08,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:47:08,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:47:08,128 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/1) ... [2022-03-15 21:47:08,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/1) ... [2022-03-15 21:47:08,138 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:47:08,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:47:08,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:47:08,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:47:08,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:47:08,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/1) ... [2022-03-15 21:47:08,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/1) ... [2022-03-15 21:47:08,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/1) ... [2022-03-15 21:47:08,165 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/1) ... [2022-03-15 21:47:08,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/1) ... [2022-03-15 21:47:08,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/1) ... [2022-03-15 21:47:08,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/1) ... [2022-03-15 21:47:08,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:47:08,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:47:08,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:47:08,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:47:08,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/1) ... [2022-03-15 21:47:08,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:47:08,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:47:08,202 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 21:47:08,205 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 21:47:08,228 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:47:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:47:08,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:47:08,228 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:47:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:47:08,228 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:47:08,229 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:47:08,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:47:08,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:47:08,229 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-15 21:47:08,229 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-15 21:47:08,229 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-15 21:47:08,230 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 21:47:08,267 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:47:08,268 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:47:08,386 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:47:08,470 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:47:08,470 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-15 21:47:08,471 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-03-15 21:47:08,471 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-15 21:47:08,471 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2022-03-15 21:47:08,472 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:47:08 BoogieIcfgContainer [2022-03-15 21:47:08,472 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:47:08,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:47:08,473 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:47:08,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:47:08,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:47:08" (1/2) ... [2022-03-15 21:47:08,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e7b35e1 and model type commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:47:08, skipping insertion in model container [2022-03-15 21:47:08,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:47:08" (2/2) ... [2022-03-15 21:47:08,486 INFO L111 eAbstractionObserver]: Analyzing ICFG commit-1.wvr.bpl [2022-03-15 21:47:08,489 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:47:08,490 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:47:08,490 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:47:08,490 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:47:08,513 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-15 21:47:08,551 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:47:08,558 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 21:47:08,559 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-15 21:47:08,569 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:47:08,577 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 27 places, 20 transitions, 64 flow [2022-03-15 21:47:08,580 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 27 places, 20 transitions, 64 flow [2022-03-15 21:47:08,581 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 20 transitions, 64 flow [2022-03-15 21:47:08,600 INFO L129 PetriNetUnfolder]: 3/17 cut-off events. [2022-03-15 21:47:08,601 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-03-15 21:47:08,603 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 17 events. 3/17 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 0 based on Foata normal form. 0/13 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2022-03-15 21:47:08,603 INFO L116 LiptonReduction]: Number of co-enabled transitions 48 [2022-03-15 21:47:08,633 INFO L131 LiptonReduction]: Checked pairs total: 54 [2022-03-15 21:47:08,633 INFO L133 LiptonReduction]: Total number of compositions: 3 [2022-03-15 21:47:08,639 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 18 transitions, 60 flow [2022-03-15 21:47:08,649 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 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 21:47:08,659 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 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 21:47:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:47:08,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:08,663 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:08,664 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:47:08,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:08,667 INFO L85 PathProgramCache]: Analyzing trace with hash 513104831, now seen corresponding path program 1 times [2022-03-15 21:47:08,679 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:08,679 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963307879] [2022-03-15 21:47:08,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:08,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:08,772 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 21:47:08,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:08,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963307879] [2022-03-15 21:47:08,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963307879] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:47:08,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:47:08,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 21:47:08,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1540301354] [2022-03-15 21:47:08,778 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:47:08,782 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:47:08,793 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 38 transitions. [2022-03-15 21:47:08,793 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:08,939 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:47:08,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:47:08,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:47:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:47:08,959 INFO L87 Difference]: Start difference. First operand has 24 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 21:47:08,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:08,989 INFO L93 Difference]: Finished difference Result 45 states and 117 transitions. [2022-03-15 21:47:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:47:08,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2022-03-15 21:47:08,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:08,998 INFO L225 Difference]: With dead ends: 45 [2022-03-15 21:47:08,998 INFO L226 Difference]: Without dead ends: 41 [2022-03-15 21:47:08,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 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 21:47:09,001 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 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 21:47:09,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:47:09,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-15 21:47:09,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-15 21:47:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.7) internal successors, (108), 40 states have internal predecessors, (108), 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 21:47:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 108 transitions. [2022-03-15 21:47:09,027 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 108 transitions. Word has length 11 [2022-03-15 21:47:09,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:09,027 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 108 transitions. [2022-03-15 21:47:09,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 21:47:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 108 transitions. [2022-03-15 21:47:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:47:09,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:09,028 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:09,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:47:09,029 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:47:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:09,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1463710907, now seen corresponding path program 1 times [2022-03-15 21:47:09,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:09,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335658333] [2022-03-15 21:47:09,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:09,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:09,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:09,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335658333] [2022-03-15 21:47:09,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335658333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:47:09,077 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:47:09,077 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:47:09,077 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [878513469] [2022-03-15 21:47:09,077 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:47:09,078 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:47:09,081 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 56 transitions. [2022-03-15 21:47:09,081 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:09,364 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [211#(and (not (= node_state 1)) (or (<= node_back node_front) (not (= node_state 0))))] [2022-03-15 21:47:09,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:47:09,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:09,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:47:09,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:47:09,366 INFO L87 Difference]: Start difference. First operand 41 states and 108 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 21:47:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:09,402 INFO L93 Difference]: Finished difference Result 57 states and 136 transitions. [2022-03-15 21:47:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:47:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 12 [2022-03-15 21:47:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:09,404 INFO L225 Difference]: With dead ends: 57 [2022-03-15 21:47:09,404 INFO L226 Difference]: Without dead ends: 55 [2022-03-15 21:47:09,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:47:09,408 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:47:09,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 7 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:47:09,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-15 21:47:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2022-03-15 21:47:09,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.590909090909091) internal successors, (114), 44 states have internal predecessors, (114), 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 21:47:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 114 transitions. [2022-03-15 21:47:09,415 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 114 transitions. Word has length 12 [2022-03-15 21:47:09,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:09,415 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 114 transitions. [2022-03-15 21:47:09,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 21:47:09,415 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 114 transitions. [2022-03-15 21:47:09,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:47:09,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:09,416 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:09,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 21:47:09,416 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:47:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:09,417 INFO L85 PathProgramCache]: Analyzing trace with hash -720758927, now seen corresponding path program 1 times [2022-03-15 21:47:09,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:09,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084522258] [2022-03-15 21:47:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:09,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:09,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:09,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084522258] [2022-03-15 21:47:09,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084522258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:47:09,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868717342] [2022-03-15 21:47:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:09,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:09,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:47:09,467 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:47:09,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 21:47:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:09,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 21:47:09,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:47:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:09,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:47:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:09,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868717342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:47:09,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:47:09,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 3 [2022-03-15 21:47:09,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2013883133] [2022-03-15 21:47:09,635 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:47:09,636 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:47:09,641 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 53 transitions. [2022-03-15 21:47:09,641 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:09,800 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [366#(and safe (<= manager_back manager_front))] [2022-03-15 21:47:09,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:47:09,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:09,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:47:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:47:09,802 INFO L87 Difference]: Start difference. First operand 45 states and 114 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 21:47:09,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:09,831 INFO L93 Difference]: Finished difference Result 64 states and 167 transitions. [2022-03-15 21:47:09,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:47:09,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 12 [2022-03-15 21:47:09,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:09,835 INFO L225 Difference]: With dead ends: 64 [2022-03-15 21:47:09,835 INFO L226 Difference]: Without dead ends: 58 [2022-03-15 21:47:09,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:47:09,838 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:47:09,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 10 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:47:09,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-15 21:47:09,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2022-03-15 21:47:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.7450980392156863) internal successors, (140), 51 states have internal predecessors, (140), 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 21:47:09,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 140 transitions. [2022-03-15 21:47:09,850 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 140 transitions. Word has length 12 [2022-03-15 21:47:09,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:09,850 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 140 transitions. [2022-03-15 21:47:09,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 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 21:47:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 140 transitions. [2022-03-15 21:47:09,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:47:09,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:09,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:09,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 21:47:10,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:10,072 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:47:10,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:10,073 INFO L85 PathProgramCache]: Analyzing trace with hash -610404845, now seen corresponding path program 1 times [2022-03-15 21:47:10,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:10,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884162189] [2022-03-15 21:47:10,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:10,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:10,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:10,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:10,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884162189] [2022-03-15 21:47:10,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884162189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:47:10,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341296157] [2022-03-15 21:47:10,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:10,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:10,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:47:10,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:47:10,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 21:47:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:10,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 21:47:10,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:47:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:10,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:47:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:10,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341296157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:47:10,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:47:10,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 3 [2022-03-15 21:47:10,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1311103908] [2022-03-15 21:47:10,225 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:47:10,226 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:47:10,227 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 53 transitions. [2022-03-15 21:47:10,227 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:10,394 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [605#(and safe (<= client_back client_front))] [2022-03-15 21:47:10,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:47:10,395 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:47:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:47:10,396 INFO L87 Difference]: Start difference. First operand 52 states and 140 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:47:10,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:10,415 INFO L93 Difference]: Finished difference Result 67 states and 169 transitions. [2022-03-15 21:47:10,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:47:10,415 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:47:10,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:10,417 INFO L225 Difference]: With dead ends: 67 [2022-03-15 21:47:10,417 INFO L226 Difference]: Without dead ends: 48 [2022-03-15 21:47:10,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:47:10,418 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:47:10,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 7 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:47:10,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-15 21:47:10,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-15 21:47:10,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 states have internal predecessors, (125), 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 21:47:10,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 125 transitions. [2022-03-15 21:47:10,428 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 125 transitions. Word has length 12 [2022-03-15 21:47:10,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:10,428 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 125 transitions. [2022-03-15 21:47:10,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:47:10,428 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 125 transitions. [2022-03-15 21:47:10,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:47:10,429 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:10,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:10,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 21:47:10,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-15 21:47:10,644 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:47:10,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:10,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1459177601, now seen corresponding path program 1 times [2022-03-15 21:47:10,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:10,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332087002] [2022-03-15 21:47:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:10,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:47:10,678 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:10,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332087002] [2022-03-15 21:47:10,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332087002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:47:10,678 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:47:10,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:47:10,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1611517207] [2022-03-15 21:47:10,678 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:47:10,679 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:47:10,682 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 63 transitions. [2022-03-15 21:47:10,682 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:10,802 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:47:10,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:47:10,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:47:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:47:10,802 INFO L87 Difference]: Start difference. First operand 48 states and 125 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 21:47:10,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:10,817 INFO L93 Difference]: Finished difference Result 28 states and 62 transitions. [2022-03-15 21:47:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:47:10,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 13 [2022-03-15 21:47:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:10,818 INFO L225 Difference]: With dead ends: 28 [2022-03-15 21:47:10,818 INFO L226 Difference]: Without dead ends: 27 [2022-03-15 21:47:10,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 23 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 21:47:10,819 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:47:10,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 7 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:47:10,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-15 21:47:10,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-15 21:47:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 26 states have internal predecessors, (61), 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 21:47:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 61 transitions. [2022-03-15 21:47:10,821 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 61 transitions. Word has length 13 [2022-03-15 21:47:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:10,821 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 61 transitions. [2022-03-15 21:47:10,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 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 21:47:10,821 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 61 transitions. [2022-03-15 21:47:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:47:10,821 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:10,821 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:10,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-15 21:47:10,822 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:47:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1189820515, now seen corresponding path program 1 times [2022-03-15 21:47:10,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:10,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103639130] [2022-03-15 21:47:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:10,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:10,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:10,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103639130] [2022-03-15 21:47:10,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103639130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:47:10,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451376586] [2022-03-15 21:47:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:10,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:10,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:47:10,884 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:47:10,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 21:47:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:10,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:47:10,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:47:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:10,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:47:11,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:47:11,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:47:11,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 123 [2022-03-15 21:47:11,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:47:11,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 117 [2022-03-15 21:47:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:11,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451376586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:47:11,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:47:11,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-03-15 21:47:11,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1494449286] [2022-03-15 21:47:11,577 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:47:11,578 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:47:11,580 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 42 transitions. [2022-03-15 21:47:11,580 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:11,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:47:12,001 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [999#(and (or (<= (+ manager_back 1) manager_front) (not (= manager_state 0)) (= update (select manager manager_front)) (not (= update (select manager manager_back)))) (or (not (= manager_state 3)) (<= client_back client_front)) (or (not (= manager_state 0)) (= update (select manager manager_front)) (<= client_back client_front) (<= manager_back manager_front)) (or safe (not (= update (select manager manager_back))) (not (= manager_state 1))) (or (not (= manager_state 2)) (<= client_back client_front) (<= manager_back manager_front)) (or (not (= manager_state 2)) (<= (+ manager_back 1) manager_front) (not (= update (select manager manager_back)))) (or (<= client_back client_front) (not (= manager_state 1))) (or (not (= manager_state 3)) safe (not (= update (select manager manager_back))))), 998#(and (or (not (= manager_state 3)) safe) (or safe (not (= manager_state 1))) (or (not (= manager_state 0)) (= update (select manager manager_front)) (<= manager_back manager_front)) (or (not (= manager_state 2)) (<= manager_back manager_front)))] [2022-03-15 21:47:12,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:47:12,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:12,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:47:12,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:47:12,002 INFO L87 Difference]: Start difference. First operand 27 states and 61 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 21:47:12,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:12,124 INFO L93 Difference]: Finished difference Result 69 states and 173 transitions. [2022-03-15 21:47:12,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:47:12,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 13 [2022-03-15 21:47:12,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:12,125 INFO L225 Difference]: With dead ends: 69 [2022-03-15 21:47:12,125 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 21:47:12,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:47:12,126 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 21 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:47:12,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:47:12,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 21:47:12,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-03-15 21:47:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.7142857142857144) internal successors, (133), 49 states have internal predecessors, (133), 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 21:47:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 133 transitions. [2022-03-15 21:47:12,128 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 133 transitions. Word has length 13 [2022-03-15 21:47:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:12,128 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 133 transitions. [2022-03-15 21:47:12,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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 21:47:12,129 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 133 transitions. [2022-03-15 21:47:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:47:12,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:12,129 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:12,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-03-15 21:47:12,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:12,346 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:47:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:12,346 INFO L85 PathProgramCache]: Analyzing trace with hash -196829739, now seen corresponding path program 1 times [2022-03-15 21:47:12,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:12,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931650934] [2022-03-15 21:47:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:12,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:12,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:47:12,385 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:12,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931650934] [2022-03-15 21:47:12,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931650934] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:47:12,385 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:47:12,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:47:12,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [414648494] [2022-03-15 21:47:12,385 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:47:12,386 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:47:12,389 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 46 transitions. [2022-03-15 21:47:12,389 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:12,474 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1177#(and (not (= node_state 1)) (or (<= node_back node_front) (not (= node_state 0))))] [2022-03-15 21:47:12,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:47:12,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:12,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:47:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:47:12,493 INFO L87 Difference]: Start difference. First operand 50 states and 133 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 21:47:12,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:12,510 INFO L93 Difference]: Finished difference Result 79 states and 195 transitions. [2022-03-15 21:47:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:47:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 14 [2022-03-15 21:47:12,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:12,511 INFO L225 Difference]: With dead ends: 79 [2022-03-15 21:47:12,511 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 21:47:12,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:47:12,512 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 22 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:47:12,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:47:12,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 21:47:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2022-03-15 21:47:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.711864406779661) internal successors, (160), 59 states have internal predecessors, (160), 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 21:47:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 160 transitions. [2022-03-15 21:47:12,515 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 160 transitions. Word has length 14 [2022-03-15 21:47:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:12,515 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 160 transitions. [2022-03-15 21:47:12,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 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 21:47:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 160 transitions. [2022-03-15 21:47:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:47:12,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:12,515 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:12,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-15 21:47:12,516 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:47:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash 199376783, now seen corresponding path program 2 times [2022-03-15 21:47:12,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:12,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694578963] [2022-03-15 21:47:12,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:12,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:12,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:12,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:12,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694578963] [2022-03-15 21:47:12,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694578963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:47:12,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961677778] [2022-03-15 21:47:12,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:47:12,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:12,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:47:12,566 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:47:12,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 21:47:12,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:47:12,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:47:12,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:47:12,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:47:12,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:12,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:47:12,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 163 [2022-03-15 21:47:12,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:47:12,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 185 treesize of output 183 [2022-03-15 21:47:12,951 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:47:12,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 177 [2022-03-15 21:47:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:13,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961677778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:47:13,257 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:47:13,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2022-03-15 21:47:13,257 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1278685559] [2022-03-15 21:47:13,257 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:47:13,259 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:47:13,262 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 52 transitions. [2022-03-15 21:47:13,262 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:13,727 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1467#(and (or (not (= client_state 0)) (not (= manager_state 0))) (or (not (= client_state 0)) (not (= manager_state 2))) (or (not (= client_state 1)) (not (= manager_state 0)) (<= client_back client_front)) (or (not (= client_state 1)) (<= client_back client_front) (not (= manager_state 1))) (or (not (= client_state 1)) (<= (+ client_back 1) client_front) (not (= manager_state 3))) (or (not (= client_state 1)) (not (= manager_state 2)) (<= client_back client_front)) (or (not (= client_state 0)) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 3)))), 1456#(and (or (not (= client_state 0)) (and (or (not (= manager_state 2)) (<= client_back client_front)) (or (not (= manager_state 0)) (<= client_back client_front)) (or (<= client_back client_front) (not (= manager_state 1))) (or (<= (+ client_back 1) client_front) (not (= manager_state 3))))) (or (not (= client_state 1)) (and (not (= manager_state 2)) (not (= manager_state 0)) (not (= manager_state 3)) (not (= manager_state 1))) (<= client_back client_front))), 1466#(and (not (= client_state 0)) (or (not (= client_state 1)) (<= client_back client_front)))] [2022-03-15 21:47:13,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:47:13,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:13,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:47:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:47:13,728 INFO L87 Difference]: Start difference. First operand 60 states and 160 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 21:47:13,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:13,798 INFO L93 Difference]: Finished difference Result 63 states and 134 transitions. [2022-03-15 21:47:13,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:47:13,799 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 14 [2022-03-15 21:47:13,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:13,799 INFO L225 Difference]: With dead ends: 63 [2022-03-15 21:47:13,799 INFO L226 Difference]: Without dead ends: 55 [2022-03-15 21:47:13,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:47:13,800 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:47:13,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 23 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:47:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-15 21:47:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2022-03-15 21:47:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 45 states have internal predecessors, (107), 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 21:47:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 107 transitions. [2022-03-15 21:47:13,802 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 107 transitions. Word has length 14 [2022-03-15 21:47:13,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:13,802 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 107 transitions. [2022-03-15 21:47:13,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 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 21:47:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 107 transitions. [2022-03-15 21:47:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:47:13,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:13,803 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:13,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 21:47:14,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:14,019 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:47:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1330459871, now seen corresponding path program 2 times [2022-03-15 21:47:14,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:14,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113186655] [2022-03-15 21:47:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:47:14,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:14,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113186655] [2022-03-15 21:47:14,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113186655] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:47:14,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226529399] [2022-03-15 21:47:14,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:47:14,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:14,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:47:14,072 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:47:14,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 21:47:14,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:47:14,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:47:14,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:47:14,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:47:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:14,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:47:14,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:47:14,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 319 treesize of output 331 [2022-03-15 21:47:16,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:47:16,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 291 treesize of output 525 [2022-03-15 21:47:16,362 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:47:16,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 259 treesize of output 259 [2022-03-15 21:48:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:08,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226529399] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:48:08,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:48:08,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 12 [2022-03-15 21:48:08,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1749788762] [2022-03-15 21:48:08,772 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:48:08,773 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:48:08,777 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 49 transitions. [2022-03-15 21:48:08,777 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:48:08,984 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1725#(and (or (not (= node_state 1)) safe) (or (<= node_back node_front) (not (= node_state 0)) (= update (select node node_front))))] [2022-03-15 21:48:08,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:48:08,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:48:08,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:48:08,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:48:08,985 INFO L87 Difference]: Start difference. First operand 46 states and 107 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 21:48:09,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:48:09,058 INFO L93 Difference]: Finished difference Result 106 states and 271 transitions. [2022-03-15 21:48:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:48:09,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 15 [2022-03-15 21:48:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:48:09,059 INFO L225 Difference]: With dead ends: 106 [2022-03-15 21:48:09,059 INFO L226 Difference]: Without dead ends: 92 [2022-03-15 21:48:09,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:48:09,061 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:48:09,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 41 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:48:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-15 21:48:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2022-03-15 21:48:09,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.7945205479452055) internal successors, (204), 73 states have internal predecessors, (204), 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 21:48:09,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 204 transitions. [2022-03-15 21:48:09,073 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 204 transitions. Word has length 15 [2022-03-15 21:48:09,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:48:09,074 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 204 transitions. [2022-03-15 21:48:09,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 21:48:09,074 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 204 transitions. [2022-03-15 21:48:09,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:48:09,075 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:48:09,075 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:48:09,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 21:48:09,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:09,292 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:48:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:48:09,293 INFO L85 PathProgramCache]: Analyzing trace with hash -444547491, now seen corresponding path program 3 times [2022-03-15 21:48:09,294 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:48:09,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039887224] [2022-03-15 21:48:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:48:09,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:48:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:48:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:09,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:48:09,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039887224] [2022-03-15 21:48:09,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039887224] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:48:09,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933446722] [2022-03-15 21:48:09,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:48:09,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:09,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:48:09,388 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:48:09,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 21:48:09,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:48:09,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:48:09,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:48:09,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:48:09,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:09,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:48:09,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:09,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 247 [2022-03-15 21:48:10,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:10,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 155 treesize of output 153 [2022-03-15 21:48:10,050 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-15 21:48:10,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 149 [2022-03-15 21:48:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:10,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933446722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:48:10,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:48:10,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-03-15 21:48:10,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1934597022] [2022-03-15 21:48:10,419 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:48:10,420 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:48:10,423 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 58 transitions. [2022-03-15 21:48:10,424 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:48:10,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:48:10,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:48:10,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:48:11,431 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [2085#(and (or (<= manager_back manager_front) (not (= manager_state 1))) (or (<= manager_back (+ manager_front 1)) (not (= manager_state 2)) (= update (select manager (+ manager_front 1)))) (or (not (= manager_state 3)) (= update (select manager manager_front)) (<= manager_back manager_front)) (or (<= manager_back (+ manager_front 1)) (not (= manager_state 0)))), 2084#(and (or (<= manager_back manager_front) (not (= manager_state 1))) (or (not (= manager_state 0)) (= update (select manager manager_front)) (<= manager_back manager_front)) (or (not (= manager_state 3)) (= update (select manager manager_front)) (<= manager_back manager_front)) (or (not (= manager_state 2)) (<= manager_back manager_front))), 2086#(and (or (not (= manager_state 0)) (not (= update (select manager manager_back))) (<= manager_back manager_front)) (or (<= client_back client_front) (<= manager_back manager_front) (not (= manager_state 1))) (or (<= manager_back (+ manager_front 1)) (not (= manager_state 0)) (<= client_back client_front)) (or (<= (+ manager_back 1) manager_front) (not (= update (select manager manager_back))) (not (= manager_state 1))) (or (not (= manager_state 2)) (= update (select manager (+ manager_front 1))) (not (= update (select manager manager_back))) (<= manager_back manager_front)) (or (<= (+ manager_back 1) manager_front) (not (= manager_state 3)) (= update (select manager manager_front)) (not (= update (select manager manager_back)))) (or (<= manager_back (+ manager_front 1)) (not (= manager_state 2)) (= update (select manager (+ manager_front 1))) (<= client_back client_front)) (or (not (= manager_state 3)) (= update (select manager manager_front)) (<= client_back client_front) (<= manager_back manager_front))), 2083#(and (or (not (= manager_state 3)) safe) (or safe (not (= manager_state 1))) (or (not (= manager_state 0)) (= update (select manager manager_front)) (<= manager_back manager_front)) (or (not (= manager_state 2)) (<= manager_back manager_front)))] [2022-03-15 21:48:11,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:48:11,432 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:48:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:48:11,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:48:11,432 INFO L87 Difference]: Start difference. First operand 74 states and 204 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 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 21:48:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:48:11,744 INFO L93 Difference]: Finished difference Result 184 states and 497 transitions. [2022-03-15 21:48:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:48:11,744 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 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 15 [2022-03-15 21:48:11,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:48:11,745 INFO L225 Difference]: With dead ends: 184 [2022-03-15 21:48:11,745 INFO L226 Difference]: Without dead ends: 168 [2022-03-15 21:48:11,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:48:11,746 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:48:11,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 72 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:48:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-15 21:48:11,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 104. [2022-03-15 21:48:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 3.0970873786407767) internal successors, (319), 103 states have internal predecessors, (319), 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 21:48:11,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 319 transitions. [2022-03-15 21:48:11,749 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 319 transitions. Word has length 15 [2022-03-15 21:48:11,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:48:11,749 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 319 transitions. [2022-03-15 21:48:11,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 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 21:48:11,749 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 319 transitions. [2022-03-15 21:48:11,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:48:11,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:48:11,750 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:48:11,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 21:48:11,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:11,963 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:48:11,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:48:11,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1152556463, now seen corresponding path program 3 times [2022-03-15 21:48:11,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:48:11,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338006549] [2022-03-15 21:48:11,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:48:11,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:48:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:48:12,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:12,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:48:12,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338006549] [2022-03-15 21:48:12,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338006549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:48:12,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468341421] [2022-03-15 21:48:12,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:48:12,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:12,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:48:12,070 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:48:12,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 21:48:12,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:48:12,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:48:12,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:48:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:48:12,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:12,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:48:13,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:13,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 369 treesize of output 381 [2022-03-15 21:48:13,927 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:13,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 272 [2022-03-15 21:48:13,966 INFO L353 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2022-03-15 21:48:13,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 264 treesize of output 270 [2022-03-15 21:48:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:15,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468341421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:48:15,969 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:48:15,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2022-03-15 21:48:15,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2077474743] [2022-03-15 21:48:15,969 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:48:15,970 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:48:15,973 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 47 transitions. [2022-03-15 21:48:15,973 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:48:16,157 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2601#(and (not (= manager_state 3)) (or (not (= manager_state 2)) (<= manager_back manager_front)) (or (not (= manager_state 0)) (<= manager_back manager_front)) (not (= manager_state 1)))] [2022-03-15 21:48:16,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:48:16,157 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:48:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:48:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:48:16,158 INFO L87 Difference]: Start difference. First operand 104 states and 319 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 21:48:16,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:48:16,206 INFO L93 Difference]: Finished difference Result 62 states and 139 transitions. [2022-03-15 21:48:16,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:48:16,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 16 [2022-03-15 21:48:16,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:48:16,207 INFO L225 Difference]: With dead ends: 62 [2022-03-15 21:48:16,207 INFO L226 Difference]: Without dead ends: 52 [2022-03-15 21:48:16,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:48:16,208 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:48:16,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 42 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:48:16,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-15 21:48:16,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-15 21:48:16,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 51 states have internal predecessors, (119), 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 21:48:16,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 119 transitions. [2022-03-15 21:48:16,212 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 119 transitions. Word has length 16 [2022-03-15 21:48:16,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:48:16,213 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 119 transitions. [2022-03-15 21:48:16,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 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 21:48:16,213 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 119 transitions. [2022-03-15 21:48:16,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:48:16,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:48:16,213 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:48:16,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 21:48:16,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:16,427 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:48:16,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:48:16,428 INFO L85 PathProgramCache]: Analyzing trace with hash 149009247, now seen corresponding path program 4 times [2022-03-15 21:48:16,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:48:16,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970253700] [2022-03-15 21:48:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:48:16,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:48:16,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:48:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:48:16,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:48:16,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970253700] [2022-03-15 21:48:16,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970253700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:48:16,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927987454] [2022-03-15 21:48:16,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:48:16,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:16,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:48:16,489 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:48:16,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 21:48:16,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:48:16,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:48:16,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:48:16,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:48:16,745 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:48:16,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:48:17,225 INFO L353 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-03-15 21:48:17,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 365 treesize of output 325 [2022-03-15 21:48:17,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:17,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 325 treesize of output 329 [2022-03-15 21:48:17,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:17,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 321 treesize of output 325 [2022-03-15 21:48:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:48:17,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927987454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:48:17,805 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:48:17,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-03-15 21:48:17,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [450588570] [2022-03-15 21:48:17,805 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:48:17,807 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:48:17,812 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 75 transitions. [2022-03-15 21:48:17,812 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:48:18,387 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2881#(and (not (= node_state 1)) (or (<= node_back node_front) (not (= node_state 0)))), 2882#(and (or (<= node_back node_front) (not (= node_state 1))) (or (<= node_back node_front) (not (= node_state 0)))), 2883#(and (or (not (= node_state 0)) (<= node_back (+ node_front 1))) (or (<= node_back node_front) (not (= node_state 1))))] [2022-03-15 21:48:18,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:48:18,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:48:18,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:48:18,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:48:18,388 INFO L87 Difference]: Start difference. First operand 52 states and 119 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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 21:48:18,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:48:18,453 INFO L93 Difference]: Finished difference Result 93 states and 213 transitions. [2022-03-15 21:48:18,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:48:18,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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 17 [2022-03-15 21:48:18,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:48:18,454 INFO L225 Difference]: With dead ends: 93 [2022-03-15 21:48:18,454 INFO L226 Difference]: Without dead ends: 81 [2022-03-15 21:48:18,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:48:18,455 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:48:18,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 41 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:48:18,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-15 21:48:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2022-03-15 21:48:18,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.66) internal successors, (133), 50 states have internal predecessors, (133), 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 21:48:18,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 133 transitions. [2022-03-15 21:48:18,457 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 133 transitions. Word has length 17 [2022-03-15 21:48:18,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:48:18,457 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 133 transitions. [2022-03-15 21:48:18,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 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 21:48:18,457 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 133 transitions. [2022-03-15 21:48:18,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:48:18,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:48:18,458 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:48:18,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-15 21:48:18,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-15 21:48:18,667 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:48:18,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:48:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1625998115, now seen corresponding path program 5 times [2022-03-15 21:48:18,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:48:18,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083845439] [2022-03-15 21:48:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:48:18,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:48:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:48:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:18,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:48:18,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083845439] [2022-03-15 21:48:18,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083845439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:48:18,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680969488] [2022-03-15 21:48:18,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:48:18,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:18,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:48:18,774 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:48:18,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 21:48:18,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:48:18,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:48:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:48:18,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:48:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:19,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:48:20,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:20,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 405 treesize of output 525 [2022-03-15 21:48:23,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:23,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 261 treesize of output 255 [2022-03-15 21:48:23,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:23,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 227 treesize of output 223 [2022-03-15 21:48:24,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:24,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680969488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:48:24,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:48:24,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-03-15 21:48:24,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1486140495] [2022-03-15 21:48:24,439 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:48:24,440 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:48:24,444 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 50 transitions. [2022-03-15 21:48:24,444 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:48:24,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:48:24,669 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3198#(and (or (not (= manager_state 3)) safe) (or safe (not (= manager_state 1))) (or (not (= manager_state 0)) (<= manager_back manager_front)) (or (not (= manager_state 2)) (<= manager_back manager_front) (= ok (select manager manager_front))))] [2022-03-15 21:48:24,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:48:24,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:48:24,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:48:24,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:48:24,670 INFO L87 Difference]: Start difference. First operand 51 states and 133 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 21:48:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:48:24,778 INFO L93 Difference]: Finished difference Result 81 states and 215 transitions. [2022-03-15 21:48:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:48:24,778 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 17 [2022-03-15 21:48:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:48:24,779 INFO L225 Difference]: With dead ends: 81 [2022-03-15 21:48:24,779 INFO L226 Difference]: Without dead ends: 73 [2022-03-15 21:48:24,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:48:24,779 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 12 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:48:24,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 70 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:48:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-15 21:48:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2022-03-15 21:48:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.782608695652174) internal successors, (192), 69 states have internal predecessors, (192), 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 21:48:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 192 transitions. [2022-03-15 21:48:24,782 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 192 transitions. Word has length 17 [2022-03-15 21:48:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:48:24,782 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 192 transitions. [2022-03-15 21:48:24,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 21:48:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 192 transitions. [2022-03-15 21:48:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:48:24,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:48:24,782 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:48:24,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 21:48:24,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-15 21:48:24,987 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:48:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:48:24,988 INFO L85 PathProgramCache]: Analyzing trace with hash -833433451, now seen corresponding path program 6 times [2022-03-15 21:48:24,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:48:24,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888506594] [2022-03-15 21:48:24,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:48:24,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:48:25,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:48:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:25,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:48:25,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888506594] [2022-03-15 21:48:25,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888506594] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:48:25,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904402717] [2022-03-15 21:48:25,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:48:25,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:25,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:48:25,134 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:48:25,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 21:48:25,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:48:25,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:48:25,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:48:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:48:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:48:25,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:48:26,368 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:26,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 409 [2022-03-15 21:48:26,378 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:26,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 401 treesize of output 401 [2022-03-15 21:48:26,386 INFO L353 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2022-03-15 21:48:26,386 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 393 treesize of output 353 [2022-03-15 21:48:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:48:26,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904402717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:48:26,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:48:26,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-03-15 21:48:26,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [562167129] [2022-03-15 21:48:26,926 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:48:26,927 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:48:26,932 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 58 transitions. [2022-03-15 21:48:26,932 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:48:27,232 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3549#(and (not (= node_state 1)) (or (<= node_back node_front) (not (= node_state 0))))] [2022-03-15 21:48:27,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:48:27,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:48:27,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:48:27,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:48:27,233 INFO L87 Difference]: Start difference. First operand 70 states and 192 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 21:48:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:48:27,280 INFO L93 Difference]: Finished difference Result 71 states and 161 transitions. [2022-03-15 21:48:27,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:48:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 18 [2022-03-15 21:48:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:48:27,281 INFO L225 Difference]: With dead ends: 71 [2022-03-15 21:48:27,281 INFO L226 Difference]: Without dead ends: 69 [2022-03-15 21:48:27,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:48:27,282 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:48:27,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 44 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:48:27,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-15 21:48:27,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2022-03-15 21:48:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.4363636363636365) internal successors, (134), 55 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 21:48:27,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 134 transitions. [2022-03-15 21:48:27,283 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 134 transitions. Word has length 18 [2022-03-15 21:48:27,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:48:27,284 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 134 transitions. [2022-03-15 21:48:27,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 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 21:48:27,284 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 134 transitions. [2022-03-15 21:48:27,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:48:27,284 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:48:27,284 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:48:27,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 21:48:27,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-15 21:48:27,489 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:48:27,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:48:27,490 INFO L85 PathProgramCache]: Analyzing trace with hash -663407793, now seen corresponding path program 7 times [2022-03-15 21:48:27,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:48:27,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157765696] [2022-03-15 21:48:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:48:27,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:48:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:48:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:48:27,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:48:27,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157765696] [2022-03-15 21:48:27,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157765696] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:48:27,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361563842] [2022-03-15 21:48:27,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:48:27,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:27,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:48:27,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:48:27,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 21:48:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:48:27,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:48:27,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:48:27,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 21:48:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:48:27,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:48:28,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:28,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 341 [2022-03-15 21:48:29,526 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-15 21:48:29,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 249 treesize of output 247 [2022-03-15 21:48:29,618 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:29,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 231 treesize of output 385 [2022-03-15 21:48:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:48:30,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361563842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:48:30,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:48:30,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-03-15 21:48:30,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1362282573] [2022-03-15 21:48:30,830 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:48:30,831 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:48:30,836 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 52 transitions. [2022-03-15 21:48:30,836 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:48:31,135 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [3853#(and (or (not (= client_state 0)) (not (= manager_state 0))) (or (not (= client_state 0)) (not (= manager_state 2))) (or (not (= client_state 1)) (not (= manager_state 0)) (<= client_back client_front)) (or (not (= client_state 1)) (<= client_back client_front) (not (= manager_state 1))) (or (not (= client_state 1)) (<= (+ client_back 1) client_front) (not (= manager_state 3))) (or (not (= client_state 1)) (not (= manager_state 2)) (<= client_back client_front)) (or (not (= client_state 0)) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 3)))), 3852#(and (not (= client_state 0)) (or (not (= client_state 1)) (<= client_back client_front)))] [2022-03-15 21:48:31,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:48:31,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:48:31,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:48:31,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:48:31,136 INFO L87 Difference]: Start difference. First operand 56 states and 134 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 21:48:31,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:48:31,194 INFO L93 Difference]: Finished difference Result 53 states and 114 transitions. [2022-03-15 21:48:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:48:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 18 [2022-03-15 21:48:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:48:31,195 INFO L225 Difference]: With dead ends: 53 [2022-03-15 21:48:31,195 INFO L226 Difference]: Without dead ends: 48 [2022-03-15 21:48:31,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:48:31,196 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:48:31,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:48:31,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-15 21:48:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-03-15 21:48:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 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 21:48:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 107 transitions. [2022-03-15 21:48:31,197 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 107 transitions. Word has length 18 [2022-03-15 21:48:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:48:31,197 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 107 transitions. [2022-03-15 21:48:31,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 21:48:31,197 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 107 transitions. [2022-03-15 21:48:31,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:48:31,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:48:31,198 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:48:31,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 21:48:31,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-15 21:48:31,411 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:48:31,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:48:31,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1224386017, now seen corresponding path program 8 times [2022-03-15 21:48:31,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:48:31,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062805825] [2022-03-15 21:48:31,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:48:31,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:48:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:48:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:48:31,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:48:31,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062805825] [2022-03-15 21:48:31,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062805825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:48:31,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678670885] [2022-03-15 21:48:31,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:48:31,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:31,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:48:31,531 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:48:31,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 21:48:31,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:48:31,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:48:31,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:48:31,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:48:31,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 21:48:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:31,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:48:33,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:33,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 439 treesize of output 435 [2022-03-15 21:48:33,758 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:33,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 288 treesize of output 280 [2022-03-15 21:48:33,770 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-03-15 21:48:33,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 272 treesize of output 246 [2022-03-15 21:48:34,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:34,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678670885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:48:34,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:48:34,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2022-03-15 21:48:34,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [984600735] [2022-03-15 21:48:34,286 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:48:34,288 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:48:34,294 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 61 transitions. [2022-03-15 21:48:34,294 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:48:34,573 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4138#(and (not (= node_state 1)) (or (<= node_back node_front) (not (= node_state 0))))] [2022-03-15 21:48:34,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:48:34,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:48:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:48:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:48:34,574 INFO L87 Difference]: Start difference. First operand 48 states and 107 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 21:48:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:48:34,618 INFO L93 Difference]: Finished difference Result 64 states and 137 transitions. [2022-03-15 21:48:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:48:34,619 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 19 [2022-03-15 21:48:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:48:34,619 INFO L225 Difference]: With dead ends: 64 [2022-03-15 21:48:34,619 INFO L226 Difference]: Without dead ends: 62 [2022-03-15 21:48:34,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:48:34,620 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 16 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:48:34,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 49 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:48:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-15 21:48:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2022-03-15 21:48:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2549019607843137) internal successors, (115), 51 states have internal predecessors, (115), 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 21:48:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 115 transitions. [2022-03-15 21:48:34,621 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 115 transitions. Word has length 19 [2022-03-15 21:48:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:48:34,621 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 115 transitions. [2022-03-15 21:48:34,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 21:48:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 115 transitions. [2022-03-15 21:48:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:48:34,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:48:34,622 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:48:34,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 21:48:34,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-15 21:48:34,835 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:48:34,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:48:34,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1295573917, now seen corresponding path program 9 times [2022-03-15 21:48:34,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:48:34,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395907028] [2022-03-15 21:48:34,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:48:34,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:48:34,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:48:34,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:34,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:48:34,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395907028] [2022-03-15 21:48:34,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395907028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:48:34,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623803011] [2022-03-15 21:48:34,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:48:34,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:34,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:48:34,972 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:48:34,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 21:48:34,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:48:34,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:48:34,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:48:35,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:48:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:35,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:48:36,561 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-15 21:48:36,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 447 treesize of output 435 [2022-03-15 21:48:37,072 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-15 21:48:37,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 333 treesize of output 327 [2022-03-15 21:48:37,107 INFO L353 Elim1Store]: treesize reduction 12, result has 80.3 percent of original size [2022-03-15 21:48:37,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 309 treesize of output 307 [2022-03-15 21:48:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:41,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623803011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:48:41,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:48:41,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2022-03-15 21:48:41,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1504516265] [2022-03-15 21:48:41,349 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:48:41,351 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:48:41,358 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 66 transitions. [2022-03-15 21:48:41,358 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:48:42,082 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [4444#(and (or (<= manager_back manager_front) (not (= manager_state 1))) (or (not (= manager_state 3)) (<= manager_back manager_front)) (or (<= manager_back (+ manager_front 1)) (not (= manager_state 2))) (or (<= manager_back (+ manager_front 1)) (not (= manager_state 0)))), 4443#(and (or (<= manager_back manager_front) (not (= manager_state 1))) (or (not (= manager_state 3)) (<= manager_back manager_front)) (or (not (= manager_state 2)) (<= manager_back manager_front)) (or (not (= manager_state 0)) (<= manager_back manager_front))), 4442#(and (not (= manager_state 3)) (or (not (= manager_state 2)) (<= manager_back manager_front)) (or (not (= manager_state 0)) (<= manager_back manager_front)) (not (= manager_state 1)))] [2022-03-15 21:48:42,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:48:42,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:48:42,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:48:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:48:42,083 INFO L87 Difference]: Start difference. First operand 52 states and 115 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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 21:48:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:48:42,159 INFO L93 Difference]: Finished difference Result 106 states and 251 transitions. [2022-03-15 21:48:42,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:48:42,159 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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 19 [2022-03-15 21:48:42,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:48:42,160 INFO L225 Difference]: With dead ends: 106 [2022-03-15 21:48:42,160 INFO L226 Difference]: Without dead ends: 96 [2022-03-15 21:48:42,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:48:42,160 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:48:42,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 75 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:48:42,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-15 21:48:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 56. [2022-03-15 21:48:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.581818181818182) internal successors, (142), 55 states have internal predecessors, (142), 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 21:48:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 142 transitions. [2022-03-15 21:48:42,162 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 142 transitions. Word has length 19 [2022-03-15 21:48:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:48:42,162 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 142 transitions. [2022-03-15 21:48:42,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 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 21:48:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 142 transitions. [2022-03-15 21:48:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:48:42,163 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:48:42,163 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:48:42,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 21:48:42,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 21:48:42,373 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:48:42,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:48:42,373 INFO L85 PathProgramCache]: Analyzing trace with hash 212292735, now seen corresponding path program 10 times [2022-03-15 21:48:42,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:48:42,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822809936] [2022-03-15 21:48:42,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:48:42,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:48:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:48:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:48:42,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:48:42,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822809936] [2022-03-15 21:48:42,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822809936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:48:42,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826670466] [2022-03-15 21:48:42,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:48:42,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:48:42,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:48:42,578 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:48:42,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:48:42,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:48:42,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 21:48:42,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:48:42,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:48:42,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 21:48:43,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:48:43,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:48:44,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:44,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 379 [2022-03-15 21:48:45,423 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:48:45,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 291 treesize of output 589 [2022-03-15 21:48:45,467 INFO L353 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-03-15 21:48:45,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 269 treesize of output 265 [2022-03-15 21:49:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:38,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826670466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:49:38,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:49:38,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2022-03-15 21:49:38,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [831660063] [2022-03-15 21:49:38,125 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:38,127 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:38,132 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 55 transitions. [2022-03-15 21:49:38,132 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:38,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-03-15 21:49:38,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-03-15 21:49:39,010 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [4794#(and (or (not (= client_state 1)) (= ok (select client client_front)) (<= client_back client_front)) (or (not (= client_state 0)) safe)), 4796#(and (or (not (= client_state 1)) (= ok (select client client_front)) (<= client_back client_front) (<= manager_back manager_front) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 2)) (not (< manager_front manager_back)) (not (= ok (select client client_back)))) (or (not (= client_state 0)) (not (< manager_front manager_back)) (not (= manager_state 0))) (or (not (= client_state 1)) (= ok (select client client_front)) (not (= manager_state 2)) (not (< manager_front manager_back)) (not (= ok (select client client_back))) (<= (+ client_back 1) client_front)) (or (not (= client_state 0)) (not (= ok (select client client_back))) (not (= manager_state 3)) (<= manager_back manager_front)) (or (not (= client_state 0)) (<= manager_back manager_front) (not (= manager_state 1))) (or (not (= client_state 1)) (= ok (select client client_front)) (not (< manager_front manager_back)) (not (= manager_state 0)) (<= client_back client_front)) (or (not (= client_state 1)) (= ok (select client client_front)) (not (= ok (select client client_back))) (<= (+ client_back 1) client_front) (not (= manager_state 3)) (<= manager_back manager_front))), 4795#(and (or (not (= client_state 1)) (= ok (select client client_front)) (not (= manager_state 0)) (<= client_back client_front) (<= manager_back manager_front)) (or (not (= client_state 0)) safe (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 2)) (<= manager_back manager_front)) (or (not (= client_state 1)) (= ok (select client client_front)) (not (= ok (select client client_back))) (<= (+ client_back 1) client_front) (not (= manager_state 3))) (or (not (= client_state 1)) (= ok (select client client_front)) (<= client_back client_front) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= ok (select client client_back))) (not (= manager_state 3)) safe) (or (not (= client_state 0)) (not (= manager_state 0)) (<= manager_back manager_front)) (or (not (= client_state 1)) (= ok (select client client_front)) (not (= manager_state 2)) (<= client_back client_front) (<= manager_back manager_front)))] [2022-03-15 21:49:39,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:49:39,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:49:39,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:49:39,011 INFO L87 Difference]: Start difference. First operand 56 states and 142 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 21:49:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:39,143 INFO L93 Difference]: Finished difference Result 84 states and 204 transitions. [2022-03-15 21:49:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:49:39,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 19 [2022-03-15 21:49:39,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:39,144 INFO L225 Difference]: With dead ends: 84 [2022-03-15 21:49:39,144 INFO L226 Difference]: Without dead ends: 72 [2022-03-15 21:49:39,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=607, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:49:39,144 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 27 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:39,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 47 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:49:39,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-15 21:49:39,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-03-15 21:49:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.507042253521127) internal successors, (178), 71 states have internal predecessors, (178), 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 21:49:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 178 transitions. [2022-03-15 21:49:39,146 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 178 transitions. Word has length 19 [2022-03-15 21:49:39,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:39,147 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 178 transitions. [2022-03-15 21:49:39,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 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 21:49:39,147 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 178 transitions. [2022-03-15 21:49:39,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:49:39,147 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:39,147 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:39,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 21:49:39,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:39,363 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1455999311, now seen corresponding path program 11 times [2022-03-15 21:49:39,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:39,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821693608] [2022-03-15 21:49:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:49:39,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:39,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821693608] [2022-03-15 21:49:39,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821693608] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:39,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982354599] [2022-03-15 21:49:39,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:49:39,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:39,550 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:49:39,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 21:49:39,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:49:39,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:49:39,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:49:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:49:40,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:49:42,080 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-15 21:49:42,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 623 treesize of output 607 [2022-03-15 21:49:42,657 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-03-15 21:49:42,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 497 treesize of output 473 [2022-03-15 21:49:42,668 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-03-15 21:49:42,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 465 treesize of output 423 [2022-03-15 21:49:43,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:49:43,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982354599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:49:43,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:49:43,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 29 [2022-03-15 21:49:43,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [170881862] [2022-03-15 21:49:43,443 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:43,445 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:43,451 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 51 transitions. [2022-03-15 21:49:43,451 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:44,166 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [5177#(and (or (not (= client_state 1)) (not (= manager_state 0)) (<= client_back client_front) (<= manager_back manager_front)) (or (not (= client_state 1)) (<= client_back client_front) (<= manager_back manager_front) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 2)) (<= manager_back manager_front)) (or (not (= client_state 0)) (<= (+ manager_back 1) manager_front) (not (= manager_state 3))) (or (not (= client_state 0)) (<= (+ manager_back 1) manager_front) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 0)) (<= manager_back manager_front)) (or (not (= client_state 1)) (<= (+ client_back 1) client_front) (not (= manager_state 3)) (<= manager_back manager_front)) (or (not (= client_state 1)) (not (= manager_state 2)) (<= client_back client_front) (<= manager_back manager_front))), 5178#(and (or (not (= client_state 1)) (<= client_back client_front) (<= manager_back manager_front) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 2)) (<= manager_back manager_front)) (or (not (= client_state 0)) (<= manager_back manager_front) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 3)) (<= manager_back manager_front)) (or (not (= client_state 0)) (not (= manager_state 0)) (<= manager_back manager_front)) (or (not (= client_state 1)) (<= (+ client_back 1) client_front) (not (= manager_state 3)) (<= manager_back manager_front)) (or (<= manager_back (+ manager_front 1)) (not (= client_state 1)) (not (= manager_state 0)) (<= client_back client_front)) (or (<= manager_back (+ manager_front 1)) (not (= client_state 1)) (not (= manager_state 2)) (<= (+ client_back 1) client_front))), 5175#(and (not (= manager_state 3)) (or (not (= manager_state 2)) (<= manager_back manager_front)) (or (not (= manager_state 0)) (<= manager_back manager_front)) (not (= manager_state 1))), 5176#(and (or (not (= client_state 1)) (not (= manager_state 0)) (<= client_back client_front) (<= manager_back manager_front)) (or (not (= client_state 1)) (<= client_back client_front) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 2)) (<= (+ manager_back 1) manager_front)) (or (not (= client_state 0)) (not (= manager_state 1))) (or (not (= client_state 1)) (not (= manager_state 3)) (<= client_back client_front)) (or (not (= client_state 0)) (<= (+ manager_back 1) manager_front) (not (= manager_state 0))) (or (not (= client_state 0)) (not (= manager_state 3))) (or (not (= client_state 1)) (not (= manager_state 2)) (<= client_back client_front) (<= manager_back manager_front)))] [2022-03-15 21:49:44,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:49:44,167 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:44,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:49:44,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:49:44,167 INFO L87 Difference]: Start difference. First operand 72 states and 178 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 21:49:44,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:44,470 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2022-03-15 21:49:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:49:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 20 [2022-03-15 21:49:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:44,471 INFO L225 Difference]: With dead ends: 124 [2022-03-15 21:49:44,471 INFO L226 Difference]: Without dead ends: 122 [2022-03-15 21:49:44,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=304, Invalid=1028, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:49:44,472 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 74 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:44,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 50 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:49:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-15 21:49:44,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 68. [2022-03-15 21:49:44,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.5223880597014925) internal successors, (169), 67 states have internal predecessors, (169), 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 21:49:44,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2022-03-15 21:49:44,477 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 20 [2022-03-15 21:49:44,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:44,477 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2022-03-15 21:49:44,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 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 21:49:44,477 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2022-03-15 21:49:44,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:49:44,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:44,478 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:44,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 21:49:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:44,691 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1787531357, now seen corresponding path program 12 times [2022-03-15 21:49:44,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:44,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933586432] [2022-03-15 21:49:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:44,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:44,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:49:44,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:44,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933586432] [2022-03-15 21:49:44,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933586432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:44,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814576791] [2022-03-15 21:49:44,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:49:44,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:44,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:44,892 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:49:44,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 21:49:44,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:49:44,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:49:44,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:49:44,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:49:45,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:49:48,267 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-15 21:49:48,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 835 treesize of output 819 [2022-03-15 21:49:49,096 INFO L353 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2022-03-15 21:49:49,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 697 treesize of output 665 [2022-03-15 21:49:49,130 INFO L353 Elim1Store]: treesize reduction 22, result has 63.9 percent of original size [2022-03-15 21:49:49,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 649 treesize of output 573 [2022-03-15 21:49:51,494 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:49:51,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814576791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:49:51,494 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:49:51,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2022-03-15 21:49:51,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [439521348] [2022-03-15 21:49:51,494 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:49:51,496 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:49:51,504 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 54 transitions. [2022-03-15 21:49:51,504 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:49:51,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:49:52,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:49:52,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:49:52,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:49:52,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:49:52,843 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [5598#(and (or (not (= manager_state 3)) safe) (or safe (not (= manager_state 1))) (or (not (= manager_state 0)) (= update (select manager manager_front)) (<= manager_back manager_front)) (or (not (= manager_state 2)) (<= manager_back manager_front))), 5602#(and (or (not (= client_state 0)) (<= (+ client_back 1) client_front) (not (= manager_state 3)) (not (= update (select manager manager_back))) (<= manager_back manager_front)) (or (not (= client_state 0)) (not (= manager_state 2)) (= update (select manager (+ manager_front 1))) (<= (+ client_back 1) client_front) (not (= update (select manager manager_back))) (<= manager_back manager_front)) (or (not (= client_state 1)) (not (< client_front (+ client_back 1))) (not (= manager_state 3)) (not (= update (select manager manager_back))) (<= manager_back manager_front)) (or (not (= client_state 1)) (not (= update (select manager manager_back))) (not (< client_front client_back)) (<= manager_back manager_front) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 0)) (not (= update (select manager manager_back))) (<= client_back client_front) (<= manager_back manager_front)) (or (not (= client_state 1)) (not (= manager_state 2)) (= update (select manager (+ manager_front 1))) (not (< client_front (+ client_back 1))) (not (= update (select manager manager_back))) (<= manager_back manager_front)) (or (not (= client_state 0)) (not (= update (select manager manager_back))) (<= client_back client_front) (<= manager_back manager_front) (not (= manager_state 1))) (or (not (= client_state 1)) (not (= manager_state 0)) (not (= update (select manager manager_back))) (not (< client_front client_back)) (<= manager_back manager_front))), 5600#(and (or (not (= client_state 1)) (<= (+ manager_back 1) manager_front) (not (= manager_state 0)) (= update (select manager manager_front)) (not (= update (select manager manager_back))) (not (< client_front client_back))) (or (not (= client_state 0)) (<= (+ manager_back 1) manager_front) (not (= manager_state 0)) (= update (select manager manager_front)) (not (= update (select manager manager_back))) (<= client_back client_front)) (or (not (= client_state 1)) (not (= manager_state 3)) (not (= update (select manager manager_back))) (not (< client_front client_back))) (or (not (= client_state 0)) (not (= manager_state 3)) (not (= update (select manager manager_back))) (<= client_back client_front)) (or (not (= client_state 1)) (not (= update (select manager manager_back))) (not (< client_front client_back)) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= update (select manager manager_back))) (<= client_back client_front) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 2)) (<= (+ manager_back 1) manager_front) (not (= update (select manager manager_back))) (<= client_back client_front)) (or (not (= client_state 1)) (not (= manager_state 2)) (<= (+ manager_back 1) manager_front) (not (= update (select manager manager_back))) (not (< client_front client_back)))), 5601#(and (or (not (= client_state 0)) (<= (+ manager_back 1) manager_front) (not (= update (select manager manager_back))) (<= client_back client_front) (not (= manager_state 1))) (or (not (= client_state 1)) (<= (+ manager_back 1) manager_front) (not (= update (select manager manager_back))) (not (< client_front client_back)) (not (= manager_state 1))) (or (not (= client_state 0)) (not (= manager_state 2)) (not (= update (select manager manager_back))) (<= client_back client_front) (<= manager_back manager_front)) (or (not (= client_state 1)) (not (= manager_state 2)) (not (= update (select manager manager_back))) (not (< client_front client_back)) (<= manager_back manager_front)) (or (not (= client_state 0)) (not (= manager_state 0)) (not (= update (select manager manager_back))) (<= client_back client_front) (<= manager_back manager_front)) (or (not (= client_state 0)) (<= (+ client_back 1) client_front) (<= (+ manager_back 1) manager_front) (not (= manager_state 3)) (= update (select manager manager_front)) (not (= update (select manager manager_back)))) (or (not (= client_state 1)) (not (= manager_state 0)) (not (= update (select manager manager_back))) (not (< client_front client_back)) (<= manager_back manager_front)) (or (not (= client_state 1)) (not (< client_front (+ client_back 1))) (<= (+ manager_back 1) manager_front) (not (= manager_state 3)) (= update (select manager manager_front)) (not (= update (select manager manager_back))))), 5599#(and (or (not (= client_state 0)) (not (= manager_state 2)) (<= (+ manager_back 1) manager_front) (not (= update (select manager manager_back)))) (or (not (= client_state 0)) (not (= manager_state 3)) safe (not (= update (select manager manager_back)))) (or (not (= client_state 0)) safe (not (= update (select manager manager_back))) (not (= manager_state 1))) (or (not (= client_state 1)) (<= client_back client_front) (not (= manager_state 1))) (or (not (= client_state 1)) (not (= manager_state 0)) (= update (select manager manager_front)) (<= client_back client_front) (<= manager_back manager_front)) (or (not (= client_state 1)) (not (= manager_state 3)) (<= client_back client_front)) (or (not (= client_state 0)) (<= (+ manager_back 1) manager_front) (not (= manager_state 0)) (= update (select manager manager_front)) (not (= update (select manager manager_back)))) (or (not (= client_state 1)) (not (= manager_state 2)) (<= client_back client_front) (<= manager_back manager_front)))] [2022-03-15 21:49:52,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:49:52,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:49:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:49:52,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:49:52,844 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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 21:49:53,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:49:53,265 INFO L93 Difference]: Finished difference Result 112 states and 289 transitions. [2022-03-15 21:49:53,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:49:53,265 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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 21 [2022-03-15 21:49:53,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:49:53,266 INFO L225 Difference]: With dead ends: 112 [2022-03-15 21:49:53,266 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 21:49:53,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=418, Invalid=1474, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:49:53,267 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:49:53,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 126 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:49:53,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 21:49:53,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 86. [2022-03-15 21:49:53,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.788235294117647) internal successors, (237), 85 states have internal predecessors, (237), 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 21:49:53,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 237 transitions. [2022-03-15 21:49:53,269 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 237 transitions. Word has length 21 [2022-03-15 21:49:53,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:49:53,269 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 237 transitions. [2022-03-15 21:49:53,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 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 21:49:53,270 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 237 transitions. [2022-03-15 21:49:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:49:53,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:49:53,270 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:49:53,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 21:49:53,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:53,483 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:49:53,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:49:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1897885439, now seen corresponding path program 13 times [2022-03-15 21:49:53,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:49:53,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197131663] [2022-03-15 21:49:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:49:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:49:53,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:53,608 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:49:53,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197131663] [2022-03-15 21:49:53,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197131663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:49:53,608 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493991432] [2022-03-15 21:49:53,608 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:49:53,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:49:53,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:49:53,609 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:49:53,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 21:49:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:49:53,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:49:53,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:49:53,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 21:49:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:49:54,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:49:55,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:49:55,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 409 [2022-03-15 21:49:57,245 INFO L353 Elim1Store]: treesize reduction 64, result has 91.1 percent of original size [2022-03-15 21:49:57,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 281 treesize of output 903 [2022-03-15 21:49:57,289 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-03-15 21:49:57,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 247 treesize of output 235 [2022-03-15 21:51:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:51:26,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493991432] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:51:26,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:51:26,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2022-03-15 21:51:26,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [115434382] [2022-03-15 21:51:26,539 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:51:26,541 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:51:26,551 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 85 transitions. [2022-03-15 21:51:26,551 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:51:27,681 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [6049#(and (or (not (= client_state 0)) (not (= manager_state 0)) (<= client_back client_front)) (or (not (= client_state 0)) (<= client_back client_front) (not (= manager_state 1))) (or (not (= client_state 1)) (<= client_back (+ client_front 1)) (not (= manager_state 1))) (or (not (= client_state 0)) (<= (+ client_back 1) client_front) (not (= manager_state 3))) (or (not (= client_state 1)) (not (= manager_state 2)) (<= client_back client_front)) (or (not (= client_state 1)) (not (= manager_state 0)) (<= client_back (+ client_front 1))) (or (not (= client_state 1)) (not (= manager_state 3)) (<= client_back client_front)) (or (not (= client_state 0)) (not (= manager_state 2)) (<= (+ client_back 1) client_front))), 6047#(and (or (not (= client_state 0)) (<= client_back client_front)) (or (not (= client_state 1)) (<= client_back (+ client_front 1)))), 6048#(and (or (not (= client_state 0)) (not (= manager_state 0)) (<= client_back client_front)) (or (not (= client_state 0)) (<= client_back client_front) (not (= manager_state 1))) (or (not (= client_state 1)) (<= client_back (+ client_front 1)) (not (= manager_state 1))) (or (not (= client_state 0)) (<= (+ client_back 1) client_front) (not (= manager_state 3))) (or (not (= client_state 1)) (not (= manager_state 0)) (<= client_back (+ client_front 1))) (or (not (= client_state 1)) (not (= manager_state 2)) (<= client_back (+ client_front 1))) (or (not (= client_state 1)) (not (= manager_state 3)) (<= client_back client_front)) (or (not (= client_state 0)) (not (= manager_state 2)) (<= client_back client_front))), 6045#(and (not (= client_state 0)) (or (not (= client_state 1)) (<= client_back client_front))), 6046#(and (or (not (= client_state 1)) (<= client_back client_front)) (or (not (= client_state 0)) (<= client_back client_front)))] [2022-03-15 21:51:27,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:51:27,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:51:27,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:51:27,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=661, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:51:27,682 INFO L87 Difference]: Start difference. First operand 86 states and 237 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 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 21:51:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:51:28,034 INFO L93 Difference]: Finished difference Result 206 states and 533 transitions. [2022-03-15 21:51:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:51:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 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 21 [2022-03-15 21:51:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:51:28,036 INFO L225 Difference]: With dead ends: 206 [2022-03-15 21:51:28,036 INFO L226 Difference]: Without dead ends: 191 [2022-03-15 21:51:28,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=437, Invalid=1123, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:51:28,037 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 116 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:51:28,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 67 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:51:28,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-15 21:51:28,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 99. [2022-03-15 21:51:28,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 3.142857142857143) internal successors, (308), 98 states have internal predecessors, (308), 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 21:51:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 308 transitions. [2022-03-15 21:51:28,040 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 308 transitions. Word has length 21 [2022-03-15 21:51:28,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:51:28,040 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 308 transitions. [2022-03-15 21:51:28,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 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 21:51:28,040 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 308 transitions. [2022-03-15 21:51:28,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:51:28,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:51:28,040 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:51:28,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 21:51:28,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:51:28,241 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:51:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:51:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1906765077, now seen corresponding path program 14 times [2022-03-15 21:51:28,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:51:28,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345960259] [2022-03-15 21:51:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:51:28,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:51:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:51:28,374 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:51:28,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:51:28,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345960259] [2022-03-15 21:51:28,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345960259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:51:28,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798333014] [2022-03-15 21:51:28,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:51:28,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:51:28,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:51:28,377 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:51:28,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 21:51:28,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:51:28,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:51:28,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:51:28,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:51:28,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 21:51:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:51:28,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:51:30,880 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-15 21:51:30,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 455 treesize of output 443 [2022-03-15 21:51:31,300 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-15 21:51:31,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 273 treesize of output 267 [2022-03-15 21:51:31,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:51:31,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 249 treesize of output 239 [2022-03-15 21:51:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:51:31,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798333014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:51:31,912 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:51:31,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2022-03-15 21:51:31,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [816482575] [2022-03-15 21:51:31,912 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:51:31,915 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:51:31,923 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 54 transitions. [2022-03-15 21:51:31,924 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:51:32,008 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:51:32,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:51:32,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:51:32,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:51:32,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:51:32,009 INFO L87 Difference]: Start difference. First operand 99 states and 308 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 21:51:32,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:51:32,146 INFO L93 Difference]: Finished difference Result 386 states and 1218 transitions. [2022-03-15 21:51:32,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:51:32,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 22 [2022-03-15 21:51:32,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:51:32,148 INFO L225 Difference]: With dead ends: 386 [2022-03-15 21:51:32,149 INFO L226 Difference]: Without dead ends: 384 [2022-03-15 21:51:32,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:51:32,149 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 58 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:51:32,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 70 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:51:32,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-03-15 21:51:32,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 190. [2022-03-15 21:51:32,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 3.761904761904762) internal successors, (711), 189 states have internal predecessors, (711), 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 21:51:32,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 711 transitions. [2022-03-15 21:51:32,155 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 711 transitions. Word has length 22 [2022-03-15 21:51:32,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:51:32,155 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 711 transitions. [2022-03-15 21:51:32,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 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 21:51:32,156 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 711 transitions. [2022-03-15 21:51:32,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:51:32,156 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:51:32,156 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:51:32,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 21:51:32,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:51:32,367 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-15 21:51:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:51:32,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1991995697, now seen corresponding path program 15 times [2022-03-15 21:51:32,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:51:32,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716616023] [2022-03-15 21:51:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:51:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:51:32,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:51:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:51:32,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:51:32,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716616023] [2022-03-15 21:51:32,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716616023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:51:32,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783511018] [2022-03-15 21:51:32,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:51:32,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:51:32,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:51:32,504 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:51:32,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 21:51:32,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:51:32,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:51:32,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:51:32,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:51:32,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-03-15 21:51:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:51:32,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:51:34,969 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-03-15 21:51:34,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 437 treesize of output 429 [2022-03-15 21:51:35,408 INFO L353 Elim1Store]: treesize reduction 21, result has 27.6 percent of original size [2022-03-15 21:51:35,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 299 treesize of output 287 [2022-03-15 21:51:36,632 INFO L353 Elim1Store]: treesize reduction 64, result has 91.1 percent of original size [2022-03-15 21:51:36,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 279 treesize of output 901 Received shutdown request... [2022-03-15 22:00:54,601 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 22:00:54,601 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 22:00:54,608 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 22:00:54,609 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-15 22:00:54,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-15 22:00:54,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:54,810 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 8ms.. [2022-03-15 22:00:54,811 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-15 22:00:54,811 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-15 22:00:54,811 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-15 22:00:54,813 INFO L732 BasicCegarLoop]: Path program histogram: [15, 3, 1, 1, 1, 1, 1] [2022-03-15 22:00:54,814 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 22:00:54,814 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 22:00:54,815 INFO L202 PluginConnector]: Adding new model commit-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 10:00:54 BasicIcfg [2022-03-15 22:00:54,815 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 22:00:54,816 INFO L158 Benchmark]: Toolchain (without parser) took 826698.91ms. Allocated memory was 194.0MB in the beginning and 593.5MB in the end (delta: 399.5MB). Free memory was 159.3MB in the beginning and 377.2MB in the end (delta: -217.9MB). Peak memory consumption was 363.8MB. Max. memory is 8.0GB. [2022-03-15 22:00:54,816 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 194.0MB. Free memory is still 160.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 22:00:54,816 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.90ms. Allocated memory is still 194.0MB. Free memory was 159.1MB in the beginning and 157.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:00:54,816 INFO L158 Benchmark]: Boogie Preprocessor took 34.20ms. Allocated memory is still 194.0MB. Free memory was 157.6MB in the beginning and 156.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 22:00:54,816 INFO L158 Benchmark]: RCFGBuilder took 296.66ms. Allocated memory is still 194.0MB. Free memory was 156.6MB in the beginning and 143.4MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-03-15 22:00:54,816 INFO L158 Benchmark]: TraceAbstraction took 826342.25ms. Allocated memory was 194.0MB in the beginning and 593.5MB in the end (delta: 399.5MB). Free memory was 143.0MB in the beginning and 377.2MB in the end (delta: -234.3MB). Peak memory consumption was 348.1MB. Max. memory is 8.0GB. [2022-03-15 22:00:54,817 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 194.0MB. Free memory is still 160.5MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 20.90ms. Allocated memory is still 194.0MB. Free memory was 159.1MB in the beginning and 157.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.20ms. Allocated memory is still 194.0MB. Free memory was 157.6MB in the beginning and 156.6MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 296.66ms. Allocated memory is still 194.0MB. Free memory was 156.6MB in the beginning and 143.4MB in the end (delta: 13.1MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 826342.25ms. Allocated memory was 194.0MB in the beginning and 593.5MB in the end (delta: 399.5MB). Free memory was 143.0MB in the beginning and 377.2MB in the end (delta: -234.3MB). Peak memory consumption was 348.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 27 PlacesBefore, 25 PlacesAfterwards, 20 TransitionsBefore, 18 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 2 FixpointIterations, 3 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 54 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 54, positive: 54, positive conditional: 0, positive unconditional: 54, 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: 15, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 54, positive: 39, positive conditional: 0, positive unconditional: 39, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 15, unknown conditional: 0, unknown unconditional: 15] , Statistics on independence cache: Total cache size (in pairs): 15, Positive cache size: 15, Positive conditional cache size: 0, Positive unconditional cache size: 15, 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 - TimeoutResultAtElement [Line: 125]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 8ms.. - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 8ms.. - TimeoutResultAtElement [Line: 118]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 8ms.. - TimeoutResultAtElement [Line: 119]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 23 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 8ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 27 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 826.3s, OverallIterations: 23, TraceHistogramMax: 5, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 713 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 713 mSDsluCounter, 907 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1740 mSDsCounter, 215 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1996 IncrementalHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 215 mSolverCounterUnsat, 165 mSDtfsCounter, 1996 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1129 GetRequests, 728 SyntacticMatches, 5 SemanticMatches, 396 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2722 ImplicationChecksByTransitivity, 10.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=190occurred in iteration=22, InterpolantAutomatonStates: 180, 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, 22 MinimizatonAttempts, 589 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 246.2s InterpolantComputationTime, 666 NumberOfCodeBlocks, 666 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 916 ConstructedInterpolants, 58 QuantifiedInterpolants, 33518 SizeOfPredicates, 277 NumberOfNonLiveVariables, 884 ConjunctsInSsa, 208 ConjunctsInUnsatCore, 58 InterpolantComputations, 4 PerfectInterpolantSequences, 226/666 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 could not prove your program: Timeout Completed graceful shutdown