/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/nonblocking-cntr.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:32:29,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:32:29,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:32:29,041 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 21:32:29,042 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 21:32:29,044 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 21:32:29,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 21:32:29,048 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 21:32:29,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 21:32:29,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 21:32:29,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 21:32:29,054 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-15 21:32:29,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-15 21:32:29,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-15 21:32:29,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-15 21:32:29,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-15 21:32:29,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-15 21:32:29,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-15 21:32:29,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-15 21:32:29,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-15 21:32:29,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-15 21:32:29,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-15 21:32:29,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-15 21:32:29,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-15 21:32:29,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-15 21:32:29,080 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 21:32:29,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 21:32:29,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 21:32:29,081 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 21:32:29,104 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:32:29,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:32:29,105 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:32:29,106 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:32:29,106 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:32:29,106 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:32:29,106 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:32:29,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:32:29,106 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:32:29,107 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:32:29,107 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:32:29,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:32:29,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:32:29,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:32:29,108 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:32:29,108 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:32:29,108 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:32:29,108 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:32:29,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:32:29,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:32:29,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:32:29,108 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:32:29,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:32:29,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:32:29,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:32:29,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:32:29,109 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:32:29,109 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:32:29,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:32:29,109 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:32:29,110 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:32:29,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:32:29,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:32:29,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:32:29,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:32:29,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:32:29,305 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:32:29,307 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:32:29,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl [2022-03-15 21:32:29,308 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/nonblocking-cntr.wvr.bpl' [2022-03-15 21:32:29,323 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:32:29,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:32:29,325 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:32:29,325 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:32:29,325 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:32:29,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/1) ... [2022-03-15 21:32:29,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/1) ... [2022-03-15 21:32:29,341 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:32:29,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:32:29,342 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:32:29,343 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:32:29,343 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:32:29,347 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/1) ... [2022-03-15 21:32:29,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/1) ... [2022-03-15 21:32:29,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/1) ... [2022-03-15 21:32:29,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/1) ... [2022-03-15 21:32:29,350 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/1) ... [2022-03-15 21:32:29,352 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/1) ... [2022-03-15 21:32:29,352 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/1) ... [2022-03-15 21:32:29,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:32:29,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:32:29,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:32:29,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:32:29,356 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/1) ... [2022-03-15 21:32:29,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:32:29,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:29,379 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 21:32:29,401 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 21:32:29,418 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:32:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:32:29,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:32:29,418 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:32:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:32:29,418 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:32:29,418 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:32:29,418 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:32:29,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:32:29,419 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 21:32:29,449 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:32:29,450 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:32:29,531 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:32:29,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:32:29,554 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 21:32:29,559 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:32:29 BoogieIcfgContainer [2022-03-15 21:32:29,559 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:32:29,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:32:29,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:32:29,564 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:32:29,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:32:29" (1/2) ... [2022-03-15 21:32:29,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@353fecc1 and model type nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:32:29, skipping insertion in model container [2022-03-15 21:32:29,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:32:29" (2/2) ... [2022-03-15 21:32:29,566 INFO L111 eAbstractionObserver]: Analyzing ICFG nonblocking-cntr.wvr.bpl [2022-03-15 21:32:29,571 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:32:29,571 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:32:29,571 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:32:29,571 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:32:29,603 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 21:32:29,638 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:32:29,645 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 21:32:29,645 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 21:32:29,654 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:32:29,663 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 28 places, 23 transitions, 62 flow [2022-03-15 21:32:29,665 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 28 places, 23 transitions, 62 flow [2022-03-15 21:32:29,667 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 62 flow [2022-03-15 21:32:29,686 INFO L129 PetriNetUnfolder]: 2/21 cut-off events. [2022-03-15 21:32:29,686 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 21:32:29,688 INFO L84 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 13 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 12. Up to 2 conditions per place. [2022-03-15 21:32:29,690 INFO L116 LiptonReduction]: Number of co-enabled transitions 48 [2022-03-15 21:32:29,916 INFO L131 LiptonReduction]: Checked pairs total: 48 [2022-03-15 21:32:29,916 INFO L133 LiptonReduction]: Total number of compositions: 11 [2022-03-15 21:32:29,921 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 13 transitions, 42 flow [2022-03-15 21:32:29,937 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 21:32:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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 21:32:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 21:32:29,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:29,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:29,942 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:29,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:29,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2130505189, now seen corresponding path program 1 times [2022-03-15 21:32:29,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:29,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648966148] [2022-03-15 21:32:29,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:29,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:30,057 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 21:32:30,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:30,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648966148] [2022-03-15 21:32:30,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648966148] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:32:30,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:32:30,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:32:30,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1919481411] [2022-03-15 21:32:30,060 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:30,061 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:30,068 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 21:32:30,068 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:30,126 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:32:30,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:32:30,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:30,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:32:30,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:32:30,147 INFO L87 Difference]: Start difference. First operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 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) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:30,177 INFO L93 Difference]: Finished difference Result 15 states and 26 transitions. [2022-03-15 21:32:30,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:32:30,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-03-15 21:32:30,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:30,182 INFO L225 Difference]: With dead ends: 15 [2022-03-15 21:32:30,183 INFO L226 Difference]: Without dead ends: 15 [2022-03-15 21:32:30,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 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 21:32:30,185 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 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 21:32:30,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:32:30,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-15 21:32:30,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-15 21:32:30,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 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 21:32:30,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 26 transitions. [2022-03-15 21:32:30,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 26 transitions. Word has length 8 [2022-03-15 21:32:30,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:30,206 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 26 transitions. [2022-03-15 21:32:30,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:30,206 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 26 transitions. [2022-03-15 21:32:30,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 21:32:30,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:30,207 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:30,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:32:30,207 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:30,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:30,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1621293822, now seen corresponding path program 1 times [2022-03-15 21:32:30,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:30,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935304296] [2022-03-15 21:32:30,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:30,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:30,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:30,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:30,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935304296] [2022-03-15 21:32:30,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935304296] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:32:30,248 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:32:30,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:32:30,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1591048944] [2022-03-15 21:32:30,248 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:30,249 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:30,251 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2022-03-15 21:32:30,251 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:30,302 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [106#(< j1 M1)] [2022-03-15 21:32:30,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:32:30,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:30,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:32:30,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 21:32:30,304 INFO L87 Difference]: Start difference. First operand 15 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 21:32:30,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:30,325 INFO L93 Difference]: Finished difference Result 19 states and 34 transitions. [2022-03-15 21:32:30,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:32:30,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 9 [2022-03-15 21:32:30,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:30,326 INFO L225 Difference]: With dead ends: 19 [2022-03-15 21:32:30,326 INFO L226 Difference]: Without dead ends: 19 [2022-03-15 21:32:30,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 21:32:30,328 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:30,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:32:30,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-15 21:32:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-15 21:32:30,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 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 21:32:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 34 transitions. [2022-03-15 21:32:30,331 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 34 transitions. Word has length 9 [2022-03-15 21:32:30,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:30,331 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 34 transitions. [2022-03-15 21:32:30,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 21:32:30,331 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 34 transitions. [2022-03-15 21:32:30,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:32:30,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:30,332 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:30,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 21:32:30,332 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash 613358463, now seen corresponding path program 1 times [2022-03-15 21:32:30,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:30,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53749772] [2022-03-15 21:32:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:30,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:30,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:30,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:30,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53749772] [2022-03-15 21:32:30,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53749772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:30,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695390723] [2022-03-15 21:32:30,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:30,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:30,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:30,418 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 21:32:30,419 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 21:32:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:30,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 21:32:30,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:30,532 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 21:32:30,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:30,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:30,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695390723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:30,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:30,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2022-03-15 21:32:30,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [843805103] [2022-03-15 21:32:30,623 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:30,624 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:30,627 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 22 transitions. [2022-03-15 21:32:30,628 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:30,790 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [220#(or (= (+ counter 1) 0) (= (+ counter 1) 1))] [2022-03-15 21:32:30,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:32:30,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:30,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:32:30,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:32:30,791 INFO L87 Difference]: Start difference. First operand 19 states and 34 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 21:32:30,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:30,813 INFO L93 Difference]: Finished difference Result 39 states and 71 transitions. [2022-03-15 21:32:30,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:32:30,814 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 10 [2022-03-15 21:32:30,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:30,814 INFO L225 Difference]: With dead ends: 39 [2022-03-15 21:32:30,814 INFO L226 Difference]: Without dead ends: 31 [2022-03-15 21:32:30,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:32:30,815 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:30,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:32:30,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-15 21:32:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2022-03-15 21:32:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 21:32:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 45 transitions. [2022-03-15 21:32:30,819 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 45 transitions. Word has length 10 [2022-03-15 21:32:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:30,819 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 45 transitions. [2022-03-15 21:32:30,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 21:32:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 45 transitions. [2022-03-15 21:32:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:32:30,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:30,820 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:30,836 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 21:32:31,027 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 21:32:31,028 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:31,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1422718885, now seen corresponding path program 2 times [2022-03-15 21:32:31,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:31,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498728704] [2022-03-15 21:32:31,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:31,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:31,065 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:31,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498728704] [2022-03-15 21:32:31,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498728704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:31,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545673470] [2022-03-15 21:32:31,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:32:31,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:31,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:31,070 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 21:32:31,071 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 21:32:31,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:32:31,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:31,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 21:32:31,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:31,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:31,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:31,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545673470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:31,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:31,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-03-15 21:32:31,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1881730208] [2022-03-15 21:32:31,211 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:31,212 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:31,213 INFO L252 McrAutomatonBuilder]: Finished intersection with 14 states and 16 transitions. [2022-03-15 21:32:31,213 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:31,224 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:32:31,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:32:31,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:31,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:32:31,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:32:31,226 INFO L87 Difference]: Start difference. First operand 24 states and 45 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 21:32:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:31,244 INFO L93 Difference]: Finished difference Result 31 states and 57 transitions. [2022-03-15 21:32:31,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:32:31,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 10 [2022-03-15 21:32:31,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:31,245 INFO L225 Difference]: With dead ends: 31 [2022-03-15 21:32:31,245 INFO L226 Difference]: Without dead ends: 29 [2022-03-15 21:32:31,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:32:31,246 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:31,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:32:31,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-15 21:32:31,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-03-15 21:32:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 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 21:32:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 45 transitions. [2022-03-15 21:32:31,249 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 45 transitions. Word has length 10 [2022-03-15 21:32:31,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:31,249 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 45 transitions. [2022-03-15 21:32:31,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 21:32:31,250 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 45 transitions. [2022-03-15 21:32:31,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:32:31,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:31,250 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:31,268 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 21:32:31,463 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 21:32:31,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:31,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:31,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1168102562, now seen corresponding path program 3 times [2022-03-15 21:32:31,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:31,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941498954] [2022-03-15 21:32:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:31,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:31,544 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:31,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:31,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941498954] [2022-03-15 21:32:31,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941498954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:31,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918640906] [2022-03-15 21:32:31,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:32:31,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:31,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:31,546 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 21:32:31,562 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 21:32:31,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 21:32:31,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:32:31,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:31,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:31,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918640906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:31,792 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:31,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2022-03-15 21:32:31,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1422071389] [2022-03-15 21:32:31,792 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:31,792 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:31,797 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 25 transitions. [2022-03-15 21:32:31,797 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:31,902 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [529#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ 2 j2) M2)), 526#(or (< j1 M1) (<= (+ j2 1) M2)), 525#(< j1 M1), 528#(or (<= (+ 2 j2) M2) (< (+ j1 1) M1) (<= M1 j1)), 527#(or (< j1 M1) (<= (+ 2 j2) M2))] [2022-03-15 21:32:31,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:32:31,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:31,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:32:31,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:32:31,903 INFO L87 Difference]: Start difference. First operand 24 states and 45 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 21:32:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:32,062 INFO L93 Difference]: Finished difference Result 64 states and 113 transitions. [2022-03-15 21:32:32,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:32:32,063 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 11 [2022-03-15 21:32:32,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:32,063 INFO L225 Difference]: With dead ends: 64 [2022-03-15 21:32:32,064 INFO L226 Difference]: Without dead ends: 62 [2022-03-15 21:32:32,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:32:32,064 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:32,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 0 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-15 21:32:32,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 33. [2022-03-15 21:32:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 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 21:32:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 68 transitions. [2022-03-15 21:32:32,068 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 68 transitions. Word has length 11 [2022-03-15 21:32:32,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:32,069 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 68 transitions. [2022-03-15 21:32:32,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 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 21:32:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 68 transitions. [2022-03-15 21:32:32,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:32:32,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:32,069 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:32,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:32,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:32,276 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:32,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:32,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2007186714, now seen corresponding path program 4 times [2022-03-15 21:32:32,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:32,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748029575] [2022-03-15 21:32:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:32,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:32,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:32,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:32,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748029575] [2022-03-15 21:32:32,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748029575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:32,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547223650] [2022-03-15 21:32:32,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:32:32,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:32,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:32,317 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 21:32:32,318 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 21:32:32,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:32:32,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-15 21:32:32,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:32,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:32,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:32,517 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 21:32:32,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547223650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:32,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:32,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-03-15 21:32:32,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2129878466] [2022-03-15 21:32:32,517 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:32,518 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:32,519 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2022-03-15 21:32:32,519 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:32,558 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [744#(< j2 M2), 745#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= j2 j1) (<= M1 j1)))] [2022-03-15 21:32:32,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:32:32,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:32,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:32:32,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:32:32,559 INFO L87 Difference]: Start difference. First operand 33 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 21:32:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:32,634 INFO L93 Difference]: Finished difference Result 45 states and 83 transitions. [2022-03-15 21:32:32,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:32:32,634 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 21:32:32,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:32,635 INFO L225 Difference]: With dead ends: 45 [2022-03-15 21:32:32,635 INFO L226 Difference]: Without dead ends: 44 [2022-03-15 21:32:32,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:32:32,636 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:32,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:32:32,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-15 21:32:32,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-03-15 21:32:32,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 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 21:32:32,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 68 transitions. [2022-03-15 21:32:32,641 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 68 transitions. Word has length 11 [2022-03-15 21:32:32,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:32,641 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 68 transitions. [2022-03-15 21:32:32,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 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 21:32:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 68 transitions. [2022-03-15 21:32:32,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:32:32,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:32,642 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:32,662 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 21:32:32,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:32,853 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1851298651, now seen corresponding path program 5 times [2022-03-15 21:32:32,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:32,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072993155] [2022-03-15 21:32:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:32,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:32,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:32,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072993155] [2022-03-15 21:32:32,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072993155] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:32,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438692023] [2022-03-15 21:32:32,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:32:32,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:32,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:32,929 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 21:32:32,930 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 21:32:32,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:32:32,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:32,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:32:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:32,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:33,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438692023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:33,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:33,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 5] total 7 [2022-03-15 21:32:33,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [575084529] [2022-03-15 21:32:33,101 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:33,101 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:33,103 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2022-03-15 21:32:33,103 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:33,272 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:32:33,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:32:33,273 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:33,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:32:33,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:32:33,274 INFO L87 Difference]: Start difference. First operand 34 states and 68 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:33,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:33,312 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2022-03-15 21:32:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:32:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:32:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:33,313 INFO L225 Difference]: With dead ends: 71 [2022-03-15 21:32:33,313 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 21:32:33,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:32:33,314 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:33,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:32:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 21:32:33,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 45. [2022-03-15 21:32:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.1818181818181817) internal successors, (96), 44 states have internal predecessors, (96), 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 21:32:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 96 transitions. [2022-03-15 21:32:33,319 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 96 transitions. Word has length 12 [2022-03-15 21:32:33,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:33,319 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 96 transitions. [2022-03-15 21:32:33,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:33,319 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 96 transitions. [2022-03-15 21:32:33,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:32:33,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:33,320 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:33,338 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 21:32:33,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:33,532 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1950701433, now seen corresponding path program 6 times [2022-03-15 21:32:33,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:33,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930471635] [2022-03-15 21:32:33,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:33,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:33,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:33,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:33,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930471635] [2022-03-15 21:32:33,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930471635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:33,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771464977] [2022-03-15 21:32:33,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:32:33,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:33,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:33,618 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 21:32:33,620 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 21:32:33,638 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:32:33,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:33,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:32:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:33,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:33,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771464977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:33,927 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:33,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-03-15 21:32:33,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1351173948] [2022-03-15 21:32:33,927 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:33,928 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:33,929 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2022-03-15 21:32:33,929 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:34,000 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [1186#(< j1 M1), 1188#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 1187#(or (< (+ j1 1) M1) (<= M1 j1))] [2022-03-15 21:32:34,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:32:34,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:34,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:32:34,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:32:34,001 INFO L87 Difference]: Start difference. First operand 45 states and 96 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 21:32:34,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:34,271 INFO L93 Difference]: Finished difference Result 80 states and 150 transitions. [2022-03-15 21:32:34,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:32:34,271 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 21:32:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:34,272 INFO L225 Difference]: With dead ends: 80 [2022-03-15 21:32:34,272 INFO L226 Difference]: Without dead ends: 78 [2022-03-15 21:32:34,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:32:34,273 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:34,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 0 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:34,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-15 21:32:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 46. [2022-03-15 21:32:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 states have internal predecessors, (98), 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 21:32:34,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 98 transitions. [2022-03-15 21:32:34,277 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 98 transitions. Word has length 12 [2022-03-15 21:32:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:34,277 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 98 transitions. [2022-03-15 21:32:34,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 21:32:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 98 transitions. [2022-03-15 21:32:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:32:34,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:34,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:34,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:34,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:34,478 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:34,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1890203511, now seen corresponding path program 7 times [2022-03-15 21:32:34,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:34,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160667491] [2022-03-15 21:32:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:34,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:34,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:34,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:34,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160667491] [2022-03-15 21:32:34,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160667491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:34,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994990898] [2022-03-15 21:32:34,535 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:32:34,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:34,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:34,536 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 21:32:34,537 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 21:32:34,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:32:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:34,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:34,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:34,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994990898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:34,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:34,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-03-15 21:32:34,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [397515889] [2022-03-15 21:32:34,812 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:34,813 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:34,814 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2022-03-15 21:32:34,814 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:34,879 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1465#(< j1 M1), 1464#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:32:34,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:32:34,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:34,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:32:34,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:32:34,880 INFO L87 Difference]: Start difference. First operand 46 states and 98 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:35,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:35,021 INFO L93 Difference]: Finished difference Result 108 states and 196 transitions. [2022-03-15 21:32:35,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:32:35,021 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:32:35,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:35,022 INFO L225 Difference]: With dead ends: 108 [2022-03-15 21:32:35,022 INFO L226 Difference]: Without dead ends: 102 [2022-03-15 21:32:35,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:32:35,022 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:35,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:35,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-15 21:32:35,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 58. [2022-03-15 21:32:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.2982456140350878) internal successors, (131), 57 states have internal predecessors, (131), 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 21:32:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 131 transitions. [2022-03-15 21:32:35,027 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 131 transitions. Word has length 12 [2022-03-15 21:32:35,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:35,027 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 131 transitions. [2022-03-15 21:32:35,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:35,027 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 131 transitions. [2022-03-15 21:32:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:32:35,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:35,028 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:35,049 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 21:32:35,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:35,244 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1910534210, now seen corresponding path program 8 times [2022-03-15 21:32:35,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:35,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559520843] [2022-03-15 21:32:35,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:35,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:35,302 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:35,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559520843] [2022-03-15 21:32:35,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559520843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:35,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052738408] [2022-03-15 21:32:35,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:32:35,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:35,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:35,303 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 21:32:35,304 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 21:32:35,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:32:35,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:35,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:32:35,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:35,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:35,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:35,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052738408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:35,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:35,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-03-15 21:32:35,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [288485343] [2022-03-15 21:32:35,589 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:35,590 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:35,591 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2022-03-15 21:32:35,591 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:35,795 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [1793#(or (< j1 M1) (<= (+ j2 1) M2)), 1794#(or (< j1 M1) (<= (+ 2 j2) M2)), 1795#(or (< j1 M1) (<= (+ 3 j2) M2)), 1797#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ 3 j2) M2)), 1798#(or (<= M1 (+ 2 j1)) (< (+ 3 j1) M1) (<= (+ 3 j2) M2)), 1792#(< j1 M1), 1796#(or (<= (+ 3 j2) M2) (< (+ j1 1) M1) (<= M1 j1))] [2022-03-15 21:32:35,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:32:35,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:35,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:32:35,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=543, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:32:35,796 INFO L87 Difference]: Start difference. First operand 58 states and 131 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 21:32:36,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:36,000 INFO L93 Difference]: Finished difference Result 118 states and 228 transitions. [2022-03-15 21:32:36,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:32:36,000 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 13 [2022-03-15 21:32:36,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:36,001 INFO L225 Difference]: With dead ends: 118 [2022-03-15 21:32:36,001 INFO L226 Difference]: Without dead ends: 110 [2022-03-15 21:32:36,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=316, Invalid=1016, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:32:36,002 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:36,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:36,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-15 21:32:36,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 60. [2022-03-15 21:32:36,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 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 21:32:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 135 transitions. [2022-03-15 21:32:36,006 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 135 transitions. Word has length 13 [2022-03-15 21:32:36,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:36,006 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 135 transitions. [2022-03-15 21:32:36,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 21:32:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 135 transitions. [2022-03-15 21:32:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:32:36,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:36,007 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:36,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:36,207 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,SelfDestructingSolverStorable9 [2022-03-15 21:32:36,207 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1781407698, now seen corresponding path program 9 times [2022-03-15 21:32:36,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:36,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340460856] [2022-03-15 21:32:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:36,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:36,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340460856] [2022-03-15 21:32:36,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340460856] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:36,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23322188] [2022-03-15 21:32:36,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:32:36,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:36,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:36,261 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 21:32:36,262 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 21:32:36,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:32:36,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:36,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:32:36,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:36,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:36,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:36,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23322188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:36,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:36,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 16 [2022-03-15 21:32:36,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [903810683] [2022-03-15 21:32:36,565 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:36,566 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:36,567 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2022-03-15 21:32:36,567 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:36,629 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2148#(and (or (<= j2 j1) (<= M1 (+ j1 1))) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 2147#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= M1 j1) (<= (+ j2 1) j1))), 2146#(< j2 M2)] [2022-03-15 21:32:36,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:32:36,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:32:36,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:32:36,630 INFO L87 Difference]: Start difference. First operand 60 states and 135 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 21:32:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:36,747 INFO L93 Difference]: Finished difference Result 80 states and 164 transitions. [2022-03-15 21:32:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:32:36,747 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 13 [2022-03-15 21:32:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:36,748 INFO L225 Difference]: With dead ends: 80 [2022-03-15 21:32:36,748 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 21:32:36,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=502, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:32:36,749 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:36,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:36,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 21:32:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 61. [2022-03-15 21:32:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.25) internal successors, (135), 60 states have internal predecessors, (135), 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 21:32:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 135 transitions. [2022-03-15 21:32:36,752 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 135 transitions. Word has length 13 [2022-03-15 21:32:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:36,752 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 135 transitions. [2022-03-15 21:32:36,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 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 21:32:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 135 transitions. [2022-03-15 21:32:36,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:32:36,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:36,753 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:36,770 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 21:32:36,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:36,964 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:36,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash -965456552, now seen corresponding path program 10 times [2022-03-15 21:32:36,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:36,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752215418] [2022-03-15 21:32:36,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:36,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:37,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:37,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:37,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752215418] [2022-03-15 21:32:37,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752215418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:37,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500233498] [2022-03-15 21:32:37,032 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:32:37,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:37,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:37,033 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 21:32:37,034 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 21:32:37,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:32:37,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:37,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-15 21:32:37,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:37,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:37,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:37,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500233498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:37,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:37,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 17 [2022-03-15 21:32:37,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1265400502] [2022-03-15 21:32:37,283 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:37,284 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:37,285 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2022-03-15 21:32:37,285 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:37,331 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2455#(< j2 M2), 2456#(or (<= (+ M1 1) j1) (< j2 M2))] [2022-03-15 21:32:37,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:32:37,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:37,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:32:37,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:32:37,332 INFO L87 Difference]: Start difference. First operand 61 states and 135 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 21:32:37,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:37,420 INFO L93 Difference]: Finished difference Result 89 states and 181 transitions. [2022-03-15 21:32:37,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:32:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 13 [2022-03-15 21:32:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:37,421 INFO L225 Difference]: With dead ends: 89 [2022-03-15 21:32:37,421 INFO L226 Difference]: Without dead ends: 88 [2022-03-15 21:32:37,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=151, Invalid=401, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:32:37,422 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:37,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:32:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-15 21:32:37,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2022-03-15 21:32:37,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.2333333333333334) internal successors, (134), 60 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 21:32:37,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 134 transitions. [2022-03-15 21:32:37,425 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 134 transitions. Word has length 13 [2022-03-15 21:32:37,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:37,425 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 134 transitions. [2022-03-15 21:32:37,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 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 21:32:37,425 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 134 transitions. [2022-03-15 21:32:37,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:32:37,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:37,426 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:37,444 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 21:32:37,636 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,SelfDestructingSolverStorable11 [2022-03-15 21:32:37,637 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:37,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:37,637 INFO L85 PathProgramCache]: Analyzing trace with hash 902839231, now seen corresponding path program 11 times [2022-03-15 21:32:37,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:37,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117907689] [2022-03-15 21:32:37,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:37,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:37,688 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:37,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117907689] [2022-03-15 21:32:37,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117907689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:37,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493531247] [2022-03-15 21:32:37,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:32:37,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:37,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:37,693 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 21:32:37,694 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 21:32:37,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:32:37,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:37,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-15 21:32:37,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:37,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:37,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493531247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:37,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:37,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 7] total 10 [2022-03-15 21:32:37,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [738395587] [2022-03-15 21:32:37,920 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:37,920 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:37,922 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2022-03-15 21:32:37,922 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:38,097 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:32:38,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:32:38,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:38,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:32:38,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:32:38,098 INFO L87 Difference]: Start difference. First operand 61 states and 134 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 21:32:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:38,151 INFO L93 Difference]: Finished difference Result 120 states and 249 transitions. [2022-03-15 21:32:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:32:38,151 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 14 [2022-03-15 21:32:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:38,152 INFO L225 Difference]: With dead ends: 120 [2022-03-15 21:32:38,152 INFO L226 Difference]: Without dead ends: 108 [2022-03-15 21:32:38,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:32:38,153 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 19 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:38,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 0 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-15 21:32:38,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 80. [2022-03-15 21:32:38,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 79 states have internal predecessors, (183), 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 21:32:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 183 transitions. [2022-03-15 21:32:38,156 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 183 transitions. Word has length 14 [2022-03-15 21:32:38,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:38,156 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 183 transitions. [2022-03-15 21:32:38,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 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 21:32:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 183 transitions. [2022-03-15 21:32:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:32:38,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:38,157 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:38,191 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 21:32:38,375 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,SelfDestructingSolverStorable12 [2022-03-15 21:32:38,375 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:38,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:38,376 INFO L85 PathProgramCache]: Analyzing trace with hash 468391653, now seen corresponding path program 12 times [2022-03-15 21:32:38,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:38,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129175713] [2022-03-15 21:32:38,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:38,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:38,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:38,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129175713] [2022-03-15 21:32:38,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129175713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:38,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404095372] [2022-03-15 21:32:38,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:32:38,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:38,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:38,468 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 21:32:38,468 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 21:32:38,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:32:38,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:32:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:38,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:39,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404095372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:39,047 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:39,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 21:32:39,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1013645391] [2022-03-15 21:32:39,047 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:39,048 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:39,049 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 24 transitions. [2022-03-15 21:32:39,049 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:39,201 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [3147#(< j1 M1), 3146#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 3149#(or (< (+ j1 1) M1) (<= M1 j1)), 3148#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 21:32:39,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:32:39,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:39,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:32:39,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:32:39,202 INFO L87 Difference]: Start difference. First operand 80 states and 183 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:32:39,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:39,578 INFO L93 Difference]: Finished difference Result 135 states and 272 transitions. [2022-03-15 21:32:39,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:32:39,578 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14 [2022-03-15 21:32:39,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:39,580 INFO L225 Difference]: With dead ends: 135 [2022-03-15 21:32:39,580 INFO L226 Difference]: Without dead ends: 131 [2022-03-15 21:32:39,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:32:39,582 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 67 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:39,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 0 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-15 21:32:39,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 77. [2022-03-15 21:32:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.3552631578947367) internal successors, (179), 76 states have internal predecessors, (179), 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 21:32:39,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 179 transitions. [2022-03-15 21:32:39,588 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 179 transitions. Word has length 14 [2022-03-15 21:32:39,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:39,589 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 179 transitions. [2022-03-15 21:32:39,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:32:39,589 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 179 transitions. [2022-03-15 21:32:39,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:32:39,590 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:39,590 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:39,608 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 21:32:39,803 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,SelfDestructingSolverStorable13 [2022-03-15 21:32:39,803 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:39,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:39,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1305115811, now seen corresponding path program 13 times [2022-03-15 21:32:39,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:39,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343522954] [2022-03-15 21:32:39,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:39,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:39,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:39,891 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:39,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343522954] [2022-03-15 21:32:39,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343522954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:39,891 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631407017] [2022-03-15 21:32:39,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:32:39,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:39,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:39,893 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 21:32:39,894 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 21:32:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:39,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:32:39,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:40,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:40,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631407017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:40,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:40,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-03-15 21:32:40,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1538926801] [2022-03-15 21:32:40,336 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:40,337 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:40,338 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 24 transitions. [2022-03-15 21:32:40,338 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:40,442 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3566#(< j1 M1), 3564#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 3565#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 21:32:40,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:32:40,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:40,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:32:40,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:32:40,443 INFO L87 Difference]: Start difference. First operand 77 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 21:32:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:40,779 INFO L93 Difference]: Finished difference Result 170 states and 347 transitions. [2022-03-15 21:32:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:32:40,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 14 [2022-03-15 21:32:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:40,780 INFO L225 Difference]: With dead ends: 170 [2022-03-15 21:32:40,780 INFO L226 Difference]: Without dead ends: 166 [2022-03-15 21:32:40,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=291, Invalid=1115, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:32:40,781 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:40,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 0 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:40,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-03-15 21:32:40,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 93. [2022-03-15 21:32:40,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.4347826086956523) internal successors, (224), 92 states have internal predecessors, (224), 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 21:32:40,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 224 transitions. [2022-03-15 21:32:40,788 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 224 transitions. Word has length 14 [2022-03-15 21:32:40,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:40,789 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 224 transitions. [2022-03-15 21:32:40,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 21:32:40,789 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 224 transitions. [2022-03-15 21:32:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:32:40,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:40,790 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:40,810 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 21:32:41,006 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,SelfDestructingSolverStorable14 [2022-03-15 21:32:41,006 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:41,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:41,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1257107565, now seen corresponding path program 14 times [2022-03-15 21:32:41,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:41,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125846954] [2022-03-15 21:32:41,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:41,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:41,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:41,067 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:41,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:41,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125846954] [2022-03-15 21:32:41,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125846954] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:41,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463126020] [2022-03-15 21:32:41,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:32:41,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:41,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:41,069 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 21:32:41,069 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 21:32:41,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:32:41,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:41,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:32:41,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:41,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:41,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:41,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463126020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:41,404 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:41,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-03-15 21:32:41,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1706679711] [2022-03-15 21:32:41,404 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:41,405 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:41,406 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2022-03-15 21:32:41,406 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:41,486 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4047#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 4048#(< j1 M1)] [2022-03-15 21:32:41,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:32:41,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:41,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:32:41,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:32:41,487 INFO L87 Difference]: Start difference. First operand 93 states and 224 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 21:32:41,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:41,600 INFO L93 Difference]: Finished difference Result 158 states and 326 transitions. [2022-03-15 21:32:41,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:32:41,601 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 21:32:41,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:41,601 INFO L225 Difference]: With dead ends: 158 [2022-03-15 21:32:41,601 INFO L226 Difference]: Without dead ends: 154 [2022-03-15 21:32:41,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:32:41,602 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:41,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:41,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-15 21:32:41,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 90. [2022-03-15 21:32:41,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.393258426966292) internal successors, (213), 89 states have internal predecessors, (213), 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 21:32:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 213 transitions. [2022-03-15 21:32:41,605 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 213 transitions. Word has length 14 [2022-03-15 21:32:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:41,605 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 213 transitions. [2022-03-15 21:32:41,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 21:32:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 213 transitions. [2022-03-15 21:32:41,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:32:41,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:41,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:41,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:41,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:41,815 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:41,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:41,815 INFO L85 PathProgramCache]: Analyzing trace with hash 383366885, now seen corresponding path program 15 times [2022-03-15 21:32:41,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:41,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683434016] [2022-03-15 21:32:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:41,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:41,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:41,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:41,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683434016] [2022-03-15 21:32:41,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683434016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:41,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693252317] [2022-03-15 21:32:41,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:32:41,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:41,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:41,897 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 21:32:41,899 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 21:32:41,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:32:41,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:41,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-15 21:32:41,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:42,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:42,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:42,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693252317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:42,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:42,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-03-15 21:32:42,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1207706204] [2022-03-15 21:32:42,246 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:42,247 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:42,248 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 21:32:42,248 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:42,373 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [4498#(< j1 M1), 4497#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 4496#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:32:42,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:32:42,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:42,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:32:42,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:32:42,374 INFO L87 Difference]: Start difference. First operand 90 states and 213 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:32:42,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:42,618 INFO L93 Difference]: Finished difference Result 175 states and 341 transitions. [2022-03-15 21:32:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:32:42,618 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 14 [2022-03-15 21:32:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:42,619 INFO L225 Difference]: With dead ends: 175 [2022-03-15 21:32:42,619 INFO L226 Difference]: Without dead ends: 165 [2022-03-15 21:32:42,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=245, Invalid=1015, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:42,620 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:42,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 0 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-15 21:32:42,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 96. [2022-03-15 21:32:42,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.4) internal successors, (228), 95 states have internal predecessors, (228), 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 21:32:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 228 transitions. [2022-03-15 21:32:42,623 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 228 transitions. Word has length 14 [2022-03-15 21:32:42,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:42,623 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 228 transitions. [2022-03-15 21:32:42,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 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 21:32:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 228 transitions. [2022-03-15 21:32:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:32:42,623 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:42,623 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:42,652 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 21:32:42,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 21:32:42,827 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2143923042, now seen corresponding path program 16 times [2022-03-15 21:32:42,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:42,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390805629] [2022-03-15 21:32:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:42,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:42,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:42,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:42,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390805629] [2022-03-15 21:32:42,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390805629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:42,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575524299] [2022-03-15 21:32:42,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:32:42,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:42,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:42,901 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 21:32:42,902 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 21:32:42,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:32:42,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:42,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:32:42,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:43,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:43,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:43,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575524299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:43,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:43,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2022-03-15 21:32:43,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1440304169] [2022-03-15 21:32:43,305 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:43,306 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:43,307 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 41 transitions. [2022-03-15 21:32:43,307 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:43,568 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [5002#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ j2 4) M2)), 4997#(or (< j1 M1) (<= (+ j2 1) M2)), 4998#(or (< j1 M1) (<= (+ 2 j2) M2)), 5004#(or (<= M1 (+ 3 j1)) (< (+ j1 4) M1) (<= (+ j2 4) M2)), 5000#(or (< j1 M1) (<= (+ j2 4) M2)), 4999#(or (< j1 M1) (<= (+ 3 j2) M2)), 4996#(< j1 M1), 5001#(or (< (+ j1 1) M1) (<= M1 j1) (<= (+ j2 4) M2)), 5003#(or (<= M1 (+ 2 j1)) (< (+ 3 j1) M1) (<= (+ j2 4) M2))] [2022-03-15 21:32:43,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:32:43,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:32:43,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:32:43,569 INFO L87 Difference]: Start difference. First operand 96 states and 228 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 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 21:32:43,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:43,915 INFO L93 Difference]: Finished difference Result 187 states and 378 transitions. [2022-03-15 21:32:43,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:32:43,915 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 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 21:32:43,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:43,916 INFO L225 Difference]: With dead ends: 187 [2022-03-15 21:32:43,916 INFO L226 Difference]: Without dead ends: 171 [2022-03-15 21:32:43,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=538, Invalid=1814, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:32:43,917 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:43,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 0 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:43,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-15 21:32:43,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 98. [2022-03-15 21:32:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.3711340206185567) internal successors, (230), 97 states have internal predecessors, (230), 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 21:32:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 230 transitions. [2022-03-15 21:32:43,921 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 230 transitions. Word has length 15 [2022-03-15 21:32:43,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:43,922 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 230 transitions. [2022-03-15 21:32:43,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 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 21:32:43,923 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 230 transitions. [2022-03-15 21:32:43,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:32:43,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:43,923 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:43,968 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 21:32:44,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 21:32:44,137 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:44,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:44,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1739199194, now seen corresponding path program 17 times [2022-03-15 21:32:44,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:44,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514759538] [2022-03-15 21:32:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:44,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:44,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:44,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:44,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514759538] [2022-03-15 21:32:44,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514759538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:44,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520405441] [2022-03-15 21:32:44,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:32:44,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:44,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:44,185 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 21:32:44,186 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 21:32:44,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:32:44,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:44,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:32:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:44,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:44,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:44,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520405441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:44,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:44,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 21 [2022-03-15 21:32:44,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2050770356] [2022-03-15 21:32:44,590 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:44,591 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:44,592 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:32:44,592 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:44,686 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [5524#(and (or (<= M1 (+ j1 1)) (<= (+ j2 1) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 5523#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= (+ 2 j2) j1) (<= M1 j1))), 5522#(< j2 M2), 5525#(and (or (<= M1 (+ 2 j1)) (<= j2 j1)) (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 21:32:44,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:32:44,686 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:44,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:32:44,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:32:44,687 INFO L87 Difference]: Start difference. First operand 98 states and 230 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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 21:32:44,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:44,824 INFO L93 Difference]: Finished difference Result 127 states and 275 transitions. [2022-03-15 21:32:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:32:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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 15 [2022-03-15 21:32:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:44,825 INFO L225 Difference]: With dead ends: 127 [2022-03-15 21:32:44,825 INFO L226 Difference]: Without dead ends: 126 [2022-03-15 21:32:44,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:44,826 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:44,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-15 21:32:44,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2022-03-15 21:32:44,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.3608247422680413) internal successors, (229), 97 states have internal predecessors, (229), 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 21:32:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 229 transitions. [2022-03-15 21:32:44,828 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 229 transitions. Word has length 15 [2022-03-15 21:32:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:44,828 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 229 transitions. [2022-03-15 21:32:44,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 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 21:32:44,828 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 229 transitions. [2022-03-15 21:32:44,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:32:44,828 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:44,828 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:44,844 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 21:32:45,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:45,036 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:45,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:45,036 INFO L85 PathProgramCache]: Analyzing trace with hash 2036962459, now seen corresponding path program 18 times [2022-03-15 21:32:45,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:45,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179477995] [2022-03-15 21:32:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:45,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:45,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:45,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:45,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:45,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179477995] [2022-03-15 21:32:45,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179477995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:45,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013161879] [2022-03-15 21:32:45,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:32:45,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:45,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:45,107 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 21:32:45,108 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 21:32:45,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:32:45,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:45,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-15 21:32:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:45,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:45,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013161879] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:45,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:45,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 9] total 13 [2022-03-15 21:32:45,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1323048697] [2022-03-15 21:32:45,397 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:45,398 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:45,400 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 46 transitions. [2022-03-15 21:32:45,400 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:45,635 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:32:45,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:32:45,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:32:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:32:45,636 INFO L87 Difference]: Start difference. First operand 98 states and 229 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 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 21:32:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:45,711 INFO L93 Difference]: Finished difference Result 179 states and 393 transitions. [2022-03-15 21:32:45,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:32:45,712 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 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 16 [2022-03-15 21:32:45,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:45,713 INFO L225 Difference]: With dead ends: 179 [2022-03-15 21:32:45,713 INFO L226 Difference]: Without dead ends: 165 [2022-03-15 21:32:45,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:32:45,713 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:45,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-15 21:32:45,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 127. [2022-03-15 21:32:45,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.4206349206349205) internal successors, (305), 126 states have internal predecessors, (305), 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 21:32:45,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 305 transitions. [2022-03-15 21:32:45,717 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 305 transitions. Word has length 16 [2022-03-15 21:32:45,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:45,717 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 305 transitions. [2022-03-15 21:32:45,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 7 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 21:32:45,717 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 305 transitions. [2022-03-15 21:32:45,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:32:45,717 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:45,717 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:45,735 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 21:32:45,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:45,931 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:45,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2061944391, now seen corresponding path program 19 times [2022-03-15 21:32:45,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:45,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268533389] [2022-03-15 21:32:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:45,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:46,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:46,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268533389] [2022-03-15 21:32:46,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268533389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:46,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223348031] [2022-03-15 21:32:46,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:32:46,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:46,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:46,039 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 21:32:46,040 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 21:32:46,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:46,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 21:32:46,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:46,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:46,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223348031] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:46,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:46,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2022-03-15 21:32:46,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1292821927] [2022-03-15 21:32:46,938 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:46,939 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:46,940 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:32:46,940 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:47,142 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [6525#(or (< (+ j1 1) M1) (<= M1 j1)), 6527#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 6528#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 6526#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 6524#(< j1 M1)] [2022-03-15 21:32:47,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:32:47,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:47,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:32:47,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:32:47,143 INFO L87 Difference]: Start difference. First operand 127 states and 305 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:47,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:47,685 INFO L93 Difference]: Finished difference Result 218 states and 459 transitions. [2022-03-15 21:32:47,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:32:47,686 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:32:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:47,687 INFO L225 Difference]: With dead ends: 218 [2022-03-15 21:32:47,687 INFO L226 Difference]: Without dead ends: 215 [2022-03-15 21:32:47,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=465, Invalid=1697, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:32:47,688 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 96 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:47,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 0 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:32:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-15 21:32:47,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 125. [2022-03-15 21:32:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.443548387096774) internal successors, (303), 124 states have internal predecessors, (303), 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 21:32:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 303 transitions. [2022-03-15 21:32:47,691 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 303 transitions. Word has length 16 [2022-03-15 21:32:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:47,691 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 303 transitions. [2022-03-15 21:32:47,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:47,691 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 303 transitions. [2022-03-15 21:32:47,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:32:47,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:47,691 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:47,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:47,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:47,907 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:47,907 INFO L85 PathProgramCache]: Analyzing trace with hash 124327881, now seen corresponding path program 20 times [2022-03-15 21:32:47,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:47,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691183342] [2022-03-15 21:32:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:47,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:48,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:48,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691183342] [2022-03-15 21:32:48,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691183342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:48,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200814803] [2022-03-15 21:32:48,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:32:48,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:48,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:48,025 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:48,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 21:32:48,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:32:48,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:48,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:32:48,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:48,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:48,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200814803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:48,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:48,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 21:32:48,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [675612466] [2022-03-15 21:32:48,620 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:48,621 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:48,622 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:32:48,622 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:48,781 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [7147#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 7148#(< j1 M1), 7145#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 7146#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1)))] [2022-03-15 21:32:48,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:32:48,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:48,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:32:48,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:32:48,782 INFO L87 Difference]: Start difference. First operand 125 states and 303 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:32:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:49,372 INFO L93 Difference]: Finished difference Result 311 states and 641 transitions. [2022-03-15 21:32:49,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:32:49,372 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 16 [2022-03-15 21:32:49,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:49,373 INFO L225 Difference]: With dead ends: 311 [2022-03-15 21:32:49,374 INFO L226 Difference]: Without dead ends: 307 [2022-03-15 21:32:49,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=493, Invalid=1957, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:32:49,374 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 76 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:49,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 0 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:49,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-15 21:32:49,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 122. [2022-03-15 21:32:49,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4297520661157024) internal successors, (294), 121 states have internal predecessors, (294), 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 21:32:49,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 294 transitions. [2022-03-15 21:32:49,378 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 294 transitions. Word has length 16 [2022-03-15 21:32:49,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:49,378 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 294 transitions. [2022-03-15 21:32:49,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 21:32:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 294 transitions. [2022-03-15 21:32:49,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:32:49,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:49,379 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:49,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:49,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-15 21:32:49,591 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:49,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:49,592 INFO L85 PathProgramCache]: Analyzing trace with hash 11930809, now seen corresponding path program 21 times [2022-03-15 21:32:49,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:49,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269231188] [2022-03-15 21:32:49,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:49,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:49,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:49,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269231188] [2022-03-15 21:32:49,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269231188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:49,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406565876] [2022-03-15 21:32:49,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:32:49,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:49,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:49,716 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:49,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 21:32:49,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:32:49,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:49,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:32:49,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:49,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:50,328 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:50,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406565876] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:50,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:50,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 30 [2022-03-15 21:32:50,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1042583231] [2022-03-15 21:32:50,328 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:50,329 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:50,330 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2022-03-15 21:32:50,330 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:50,529 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [7862#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 7863#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 7864#(< j1 M1), 7861#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:32:50,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:32:50,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:50,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:32:50,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=981, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:32:50,530 INFO L87 Difference]: Start difference. First operand 122 states and 294 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:50,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:50,997 INFO L93 Difference]: Finished difference Result 277 states and 586 transitions. [2022-03-15 21:32:50,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:32:50,997 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:32:50,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:50,998 INFO L225 Difference]: With dead ends: 277 [2022-03-15 21:32:50,998 INFO L226 Difference]: Without dead ends: 271 [2022-03-15 21:32:50,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 581 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=495, Invalid=2055, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:32:50,999 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:50,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:50,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-15 21:32:51,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 124. [2022-03-15 21:32:51,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.4227642276422765) internal successors, (298), 123 states have internal predecessors, (298), 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 21:32:51,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 298 transitions. [2022-03-15 21:32:51,002 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 298 transitions. Word has length 16 [2022-03-15 21:32:51,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:51,002 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 298 transitions. [2022-03-15 21:32:51,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:32:51,003 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 298 transitions. [2022-03-15 21:32:51,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:32:51,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:51,003 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:51,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-15 21:32:51,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-15 21:32:51,211 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:51,212 INFO L85 PathProgramCache]: Analyzing trace with hash 19904457, now seen corresponding path program 22 times [2022-03-15 21:32:51,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:51,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798422940] [2022-03-15 21:32:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:51,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:51,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:51,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:51,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798422940] [2022-03-15 21:32:51,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798422940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:51,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980552136] [2022-03-15 21:32:51,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:32:51,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:51,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:51,287 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:51,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 21:32:51,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:32:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:51,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:32:51,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:51,476 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:51,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:51,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980552136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:51,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:51,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2022-03-15 21:32:51,735 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [111036554] [2022-03-15 21:32:51,736 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:51,736 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:51,737 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2022-03-15 21:32:51,737 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:51,798 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [8540#(< j1 M1), 8539#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:32:51,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:32:51,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:51,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:32:51,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:32:51,799 INFO L87 Difference]: Start difference. First operand 124 states and 298 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 21:32:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:51,958 INFO L93 Difference]: Finished difference Result 295 states and 623 transitions. [2022-03-15 21:32:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:32:51,959 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 16 [2022-03-15 21:32:51,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:51,960 INFO L225 Difference]: With dead ends: 295 [2022-03-15 21:32:51,960 INFO L226 Difference]: Without dead ends: 291 [2022-03-15 21:32:51,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:32:51,961 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:51,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 0 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:51,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-15 21:32:51,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 167. [2022-03-15 21:32:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.5421686746987953) internal successors, (422), 166 states have internal predecessors, (422), 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 21:32:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 422 transitions. [2022-03-15 21:32:51,965 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 422 transitions. Word has length 16 [2022-03-15 21:32:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:51,965 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 422 transitions. [2022-03-15 21:32:51,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 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 21:32:51,965 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 422 transitions. [2022-03-15 21:32:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:32:51,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:51,966 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:51,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-15 21:32:52,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:52,175 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:52,176 INFO L85 PathProgramCache]: Analyzing trace with hash -853836223, now seen corresponding path program 23 times [2022-03-15 21:32:52,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:52,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115338308] [2022-03-15 21:32:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:52,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:32:52,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:52,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115338308] [2022-03-15 21:32:52,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115338308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:52,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115380761] [2022-03-15 21:32:52,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:32:52,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:52,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:52,252 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:52,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 21:32:52,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:32:52,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:52,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:32:52,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:52,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:52,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:52,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115380761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:52,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:52,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2022-03-15 21:32:52,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [708396905] [2022-03-15 21:32:52,695 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:52,696 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:52,697 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:32:52,697 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:52,832 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [9303#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 9304#(< j1 M1), 9302#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:32:52,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:32:52,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:52,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:32:52,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:32:52,833 INFO L87 Difference]: Start difference. First operand 167 states and 422 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:32:53,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:53,032 INFO L93 Difference]: Finished difference Result 252 states and 537 transitions. [2022-03-15 21:32:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:32:53,032 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 16 [2022-03-15 21:32:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:53,033 INFO L225 Difference]: With dead ends: 252 [2022-03-15 21:32:53,033 INFO L226 Difference]: Without dead ends: 246 [2022-03-15 21:32:53,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=1226, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:32:53,034 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:53,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 0 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-15 21:32:53,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 143. [2022-03-15 21:32:53,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.436619718309859) internal successors, (346), 142 states have internal predecessors, (346), 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 21:32:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 346 transitions. [2022-03-15 21:32:53,037 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 346 transitions. Word has length 16 [2022-03-15 21:32:53,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:53,037 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 346 transitions. [2022-03-15 21:32:53,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 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 21:32:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 346 transitions. [2022-03-15 21:32:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:32:53,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:53,038 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:53,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:53,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:53,251 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:53,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:53,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2124973769, now seen corresponding path program 24 times [2022-03-15 21:32:53,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:53,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749857678] [2022-03-15 21:32:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:53,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:53,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:53,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749857678] [2022-03-15 21:32:53,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749857678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:53,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619421267] [2022-03-15 21:32:53,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:32:53,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:53,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:53,338 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:53,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 21:32:53,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:32:53,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:53,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:32:53,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:53,527 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:53,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:53,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:53,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619421267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:53,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:53,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-03-15 21:32:53,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1127626076] [2022-03-15 21:32:53,777 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:53,778 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:53,779 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2022-03-15 21:32:53,780 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:53,992 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [9978#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 9981#(< j1 M1), 9979#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 9980#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:32:53,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:32:53,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:32:53,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:32:53,993 INFO L87 Difference]: Start difference. First operand 143 states and 346 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 21:32:54,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:54,312 INFO L93 Difference]: Finished difference Result 252 states and 511 transitions. [2022-03-15 21:32:54,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:32:54,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 16 [2022-03-15 21:32:54,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:54,313 INFO L225 Difference]: With dead ends: 252 [2022-03-15 21:32:54,313 INFO L226 Difference]: Without dead ends: 238 [2022-03-15 21:32:54,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=1688, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:32:54,314 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:54,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 0 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:54,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-03-15 21:32:54,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 151. [2022-03-15 21:32:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.44) internal successors, (366), 150 states have internal predecessors, (366), 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 21:32:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 366 transitions. [2022-03-15 21:32:54,317 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 366 transitions. Word has length 16 [2022-03-15 21:32:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:54,317 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 366 transitions. [2022-03-15 21:32:54,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 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 21:32:54,318 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 366 transitions. [2022-03-15 21:32:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:32:54,318 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:54,318 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:54,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-15 21:32:54,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-15 21:32:54,530 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash 717596542, now seen corresponding path program 25 times [2022-03-15 21:32:54,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:54,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356054418] [2022-03-15 21:32:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:54,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:54,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:54,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356054418] [2022-03-15 21:32:54,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356054418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:54,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974792650] [2022-03-15 21:32:54,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:32:54,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:54,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:54,621 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:54,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 21:32:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:54,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:32:54,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:54,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:54,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:55,083 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:55,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974792650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:55,083 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:55,083 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2022-03-15 21:32:55,083 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1772514583] [2022-03-15 21:32:55,083 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:55,084 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:55,086 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 49 transitions. [2022-03-15 21:32:55,086 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:55,436 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [10694#(or (< j1 M1) (<= (+ j2 4) M2)), 10695#(or (< j1 M1) (<= (+ 5 j2) M2)), 10693#(or (< j1 M1) (<= (+ 3 j2) M2)), 10690#(< j1 M1), 10691#(or (< j1 M1) (<= (+ j2 1) M2)), 10697#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ 5 j2) M2)), 10696#(or (<= (+ 5 j2) M2) (< (+ j1 1) M1) (<= M1 j1)), 10699#(or (<= M1 (+ 3 j1)) (<= (+ 5 j2) M2) (< (+ j1 4) M1)), 10692#(or (< j1 M1) (<= (+ 2 j2) M2)), 10698#(or (<= M1 (+ 2 j1)) (<= (+ 5 j2) M2) (< (+ 3 j1) M1)), 10700#(or (<= (+ 5 j2) M2) (< (+ 5 j1) M1) (<= M1 (+ j1 4)))] [2022-03-15 21:32:55,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:32:55,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:55,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:32:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=1448, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:32:55,438 INFO L87 Difference]: Start difference. First operand 151 states and 366 transitions. Second operand has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 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 21:32:55,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:55,857 INFO L93 Difference]: Finished difference Result 274 states and 571 transitions. [2022-03-15 21:32:55,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:32:55,858 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 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 21:32:55,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:55,859 INFO L225 Difference]: With dead ends: 274 [2022-03-15 21:32:55,859 INFO L226 Difference]: Without dead ends: 250 [2022-03-15 21:32:55,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=821, Invalid=2839, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:32:55,860 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 113 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:55,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 0 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:32:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-15 21:32:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 152. [2022-03-15 21:32:55,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.4172185430463577) internal successors, (365), 151 states have internal predecessors, (365), 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 21:32:55,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 365 transitions. [2022-03-15 21:32:55,863 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 365 transitions. Word has length 17 [2022-03-15 21:32:55,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:55,863 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 365 transitions. [2022-03-15 21:32:55,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.8333333333333333) internal successors, (44), 23 states have internal predecessors, (44), 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 21:32:55,863 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 365 transitions. [2022-03-15 21:32:55,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:32:55,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:55,864 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:55,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:56,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-15 21:32:56,071 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:56,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash 943380718, now seen corresponding path program 26 times [2022-03-15 21:32:56,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:56,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021393373] [2022-03-15 21:32:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:56,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:56,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:56,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021393373] [2022-03-15 21:32:56,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021393373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:56,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455071084] [2022-03-15 21:32:56,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:32:56,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:56,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:56,136 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:56,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 21:32:56,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:32:56,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:56,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:32:56,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:56,346 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:56,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:56,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455071084] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:56,620 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:56,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 26 [2022-03-15 21:32:56,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [13364494] [2022-03-15 21:32:56,621 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:56,621 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:56,623 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 31 transitions. [2022-03-15 21:32:56,623 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:56,768 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [11440#(and (or (<= M1 (+ j1 1)) (<= (+ 2 j2) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 11442#(and (or (<= M1 (+ 3 j1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M1 (+ 3 j1)) (<= j2 j1))), 11439#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= (+ 3 j2) j1) (<= M1 j1))), 11441#(and (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M1 (+ 2 j1)) (<= (+ j2 1) j1))), 11438#(< j2 M2)] [2022-03-15 21:32:56,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:32:56,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:32:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:32:56,769 INFO L87 Difference]: Start difference. First operand 152 states and 365 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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 21:32:56,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:56,961 INFO L93 Difference]: Finished difference Result 191 states and 428 transitions. [2022-03-15 21:32:56,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:32:56,962 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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 21:32:56,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:56,962 INFO L225 Difference]: With dead ends: 191 [2022-03-15 21:32:56,962 INFO L226 Difference]: Without dead ends: 190 [2022-03-15 21:32:56,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=525, Invalid=1455, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:32:56,963 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:56,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 0 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:56,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-15 21:32:56,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 152. [2022-03-15 21:32:56,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.410596026490066) internal successors, (364), 151 states have internal predecessors, (364), 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 21:32:56,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 364 transitions. [2022-03-15 21:32:56,967 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 364 transitions. Word has length 17 [2022-03-15 21:32:56,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:56,967 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 364 transitions. [2022-03-15 21:32:56,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 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 21:32:56,967 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 364 transitions. [2022-03-15 21:32:56,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:32:56,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:56,968 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:56,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:57,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-15 21:32:57,168 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:57,168 INFO L85 PathProgramCache]: Analyzing trace with hash 770513919, now seen corresponding path program 27 times [2022-03-15 21:32:57,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:57,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450487995] [2022-03-15 21:32:57,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:57,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:57,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:57,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450487995] [2022-03-15 21:32:57,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450487995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:57,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847857792] [2022-03-15 21:32:57,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:32:57,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:57,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:57,260 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:57,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 21:32:57,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:32:57,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:57,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:32:57,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:57,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:57,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:57,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847857792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:57,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:57,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 15 [2022-03-15 21:32:57,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [412666090] [2022-03-15 21:32:57,484 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:57,485 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:57,487 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 54 transitions. [2022-03-15 21:32:57,487 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:57,816 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:32:57,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:32:57,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:57,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:32:57,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:32:57,817 INFO L87 Difference]: Start difference. First operand 152 states and 364 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 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 21:32:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:32:57,906 INFO L93 Difference]: Finished difference Result 266 states and 595 transitions. [2022-03-15 21:32:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:32:57,906 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 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 18 [2022-03-15 21:32:57,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:32:57,907 INFO L225 Difference]: With dead ends: 266 [2022-03-15 21:32:57,907 INFO L226 Difference]: Without dead ends: 250 [2022-03-15 21:32:57,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:32:57,907 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 25 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:32:57,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 0 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:32:57,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-15 21:32:57,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2022-03-15 21:32:57,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.4635416666666665) internal successors, (473), 192 states have internal predecessors, (473), 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 21:32:57,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 473 transitions. [2022-03-15 21:32:57,928 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 473 transitions. Word has length 18 [2022-03-15 21:32:57,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:32:57,928 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 473 transitions. [2022-03-15 21:32:57,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 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 21:32:57,928 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 473 transitions. [2022-03-15 21:32:57,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:32:57,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:32:57,929 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:32:57,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 21:32:58,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 21:32:58,144 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:32:58,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:32:58,145 INFO L85 PathProgramCache]: Analyzing trace with hash -962513371, now seen corresponding path program 28 times [2022-03-15 21:32:58,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:32:58,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958731528] [2022-03-15 21:32:58,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:32:58,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:32:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:32:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:58,278 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:32:58,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958731528] [2022-03-15 21:32:58,278 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958731528] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:32:58,278 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256941354] [2022-03-15 21:32:58,278 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:32:58,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:32:58,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:32:58,279 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:32:58,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 21:32:58,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:32:58,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:32:58,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:32:58,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:32:58,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:58,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:32:59,467 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:32:59,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256941354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:32:59,468 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:32:59,468 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 31 [2022-03-15 21:32:59,468 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [71047009] [2022-03-15 21:32:59,468 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:32:59,469 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:32:59,470 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 21:32:59,470 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:32:59,726 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [12872#(and (or (<= 2 counter) (not (< (+ j1 1) M1))) (or (<= counter 2) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 12874#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 12871#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter 3)) (or (not (< j1 M1)) (<= 3 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 12869#(< j1 M1), 12870#(or (< (+ j1 1) M1) (<= M1 j1)), 12873#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ 2 j1) M1))) (or (<= 1 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))))] [2022-03-15 21:32:59,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:32:59,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:32:59,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:32:59,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1126, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:32:59,727 INFO L87 Difference]: Start difference. First operand 193 states and 473 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 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 21:33:00,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:00,489 INFO L93 Difference]: Finished difference Result 333 states and 714 transitions. [2022-03-15 21:33:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:33:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 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 21:33:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:00,490 INFO L225 Difference]: With dead ends: 333 [2022-03-15 21:33:00,490 INFO L226 Difference]: Without dead ends: 330 [2022-03-15 21:33:00,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=648, Invalid=2432, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:33:00,491 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:00,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 0 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:00,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-15 21:33:00,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 190. [2022-03-15 21:33:00,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.4814814814814814) internal successors, (469), 189 states have internal predecessors, (469), 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 21:33:00,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 469 transitions. [2022-03-15 21:33:00,495 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 469 transitions. Word has length 18 [2022-03-15 21:33:00,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:00,495 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 469 transitions. [2022-03-15 21:33:00,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 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 21:33:00,495 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 469 transitions. [2022-03-15 21:33:00,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:33:00,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:00,496 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:00,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:00,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:00,710 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:00,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:00,710 INFO L85 PathProgramCache]: Analyzing trace with hash -577120867, now seen corresponding path program 29 times [2022-03-15 21:33:00,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:00,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639234551] [2022-03-15 21:33:00,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:00,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:00,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:00,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:00,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639234551] [2022-03-15 21:33:00,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639234551] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:00,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241308544] [2022-03-15 21:33:00,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:00,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:00,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:00,839 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:00,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 21:33:00,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:33:00,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:00,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:33:00,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:01,092 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:01,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:01,723 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241308544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:01,723 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:01,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2022-03-15 21:33:01,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [868794340] [2022-03-15 21:33:01,723 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:01,724 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:01,726 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 21:33:01,726 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:01,946 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [13759#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 13760#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 13762#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 13761#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 13763#(< j1 M1)] [2022-03-15 21:33:01,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:33:01,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:01,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:33:01,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:33:01,947 INFO L87 Difference]: Start difference. First operand 190 states and 469 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21:33:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:03,047 INFO L93 Difference]: Finished difference Result 503 states and 1031 transitions. [2022-03-15 21:33:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:33:03,047 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 18 [2022-03-15 21:33:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:03,049 INFO L225 Difference]: With dead ends: 503 [2022-03-15 21:33:03,049 INFO L226 Difference]: Without dead ends: 497 [2022-03-15 21:33:03,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=871, Invalid=3551, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:33:03,050 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 126 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:03,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 0 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:03,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-03-15 21:33:03,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 187. [2022-03-15 21:33:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.4838709677419355) internal successors, (462), 186 states have internal predecessors, (462), 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 21:33:03,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 462 transitions. [2022-03-15 21:33:03,055 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 462 transitions. Word has length 18 [2022-03-15 21:33:03,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:03,055 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 462 transitions. [2022-03-15 21:33:03,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21:33:03,055 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 462 transitions. [2022-03-15 21:33:03,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:33:03,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:03,055 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:03,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:03,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:03,271 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:03,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:03,271 INFO L85 PathProgramCache]: Analyzing trace with hash -682215899, now seen corresponding path program 30 times [2022-03-15 21:33:03,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:03,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538835384] [2022-03-15 21:33:03,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:03,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:03,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:03,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538835384] [2022-03-15 21:33:03,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538835384] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:03,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440134037] [2022-03-15 21:33:03,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:03,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:03,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:03,401 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:03,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 21:33:03,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:33:03,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:03,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 21:33:03,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:03,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:04,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440134037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:04,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:04,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-03-15 21:33:04,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1614588166] [2022-03-15 21:33:04,147 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:04,148 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:04,149 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2022-03-15 21:33:04,149 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:04,382 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [14835#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 14838#(< j1 M1), 14836#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 14837#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 14792#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:33:04,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:33:04,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:04,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:33:04,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:33:04,383 INFO L87 Difference]: Start difference. First operand 187 states and 462 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 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 21:33:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:05,142 INFO L93 Difference]: Finished difference Result 533 states and 1096 transitions. [2022-03-15 21:33:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:33:05,142 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 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 21:33:05,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:05,144 INFO L225 Difference]: With dead ends: 533 [2022-03-15 21:33:05,144 INFO L226 Difference]: Without dead ends: 521 [2022-03-15 21:33:05,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=674, Invalid=2986, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:33:05,145 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 104 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:05,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 0 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:05,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-03-15 21:33:05,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 187. [2022-03-15 21:33:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.4838709677419355) internal successors, (462), 186 states have internal predecessors, (462), 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 21:33:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 462 transitions. [2022-03-15 21:33:05,150 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 462 transitions. Word has length 18 [2022-03-15 21:33:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:05,150 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 462 transitions. [2022-03-15 21:33:05,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 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 21:33:05,150 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 462 transitions. [2022-03-15 21:33:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:33:05,150 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:05,150 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:05,166 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-03-15 21:33:05,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-03-15 21:33:05,366 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:05,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:05,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1321619691, now seen corresponding path program 31 times [2022-03-15 21:33:05,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:05,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804545050] [2022-03-15 21:33:05,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:05,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:05,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:05,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804545050] [2022-03-15 21:33:05,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804545050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:05,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116738234] [2022-03-15 21:33:05,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:05,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:05,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:05,489 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:05,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 21:33:05,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:05,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:33:05,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:05,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:06,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116738234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:06,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:06,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 35 [2022-03-15 21:33:06,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1720098041] [2022-03-15 21:33:06,175 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:06,176 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:06,178 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2022-03-15 21:33:06,178 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:06,358 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [15933#(< j1 M1), 15932#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 15931#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 15930#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 21:33:06,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:33:06,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:06,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:33:06,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:33:06,359 INFO L87 Difference]: Start difference. First operand 187 states and 462 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 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 21:33:06,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:06,812 INFO L93 Difference]: Finished difference Result 390 states and 866 transitions. [2022-03-15 21:33:06,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:33:06,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 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 21:33:06,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:06,813 INFO L225 Difference]: With dead ends: 390 [2022-03-15 21:33:06,814 INFO L226 Difference]: Without dead ends: 384 [2022-03-15 21:33:06,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=527, Invalid=2335, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:33:06,815 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:06,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 0 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:06,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-03-15 21:33:06,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 212. [2022-03-15 21:33:06,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.4976303317535544) internal successors, (527), 211 states have internal predecessors, (527), 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 21:33:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 527 transitions. [2022-03-15 21:33:06,819 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 527 transitions. Word has length 18 [2022-03-15 21:33:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:06,819 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 527 transitions. [2022-03-15 21:33:06,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 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 21:33:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 527 transitions. [2022-03-15 21:33:06,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:33:06,819 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:06,819 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:06,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:07,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:07,035 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:07,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:07,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1657190301, now seen corresponding path program 32 times [2022-03-15 21:33:07,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:07,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247647981] [2022-03-15 21:33:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:07,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:07,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247647981] [2022-03-15 21:33:07,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247647981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:07,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650117193] [2022-03-15 21:33:07,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:07,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:07,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:07,169 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:07,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 21:33:07,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:07,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:07,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-15 21:33:07,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:07,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:07,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650117193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:07,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:07,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-03-15 21:33:07,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [313418603] [2022-03-15 21:33:07,809 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:07,810 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:07,811 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 36 transitions. [2022-03-15 21:33:07,811 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:08,062 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [16916#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 16913#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 16870#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 16914#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 16915#(< j1 M1)] [2022-03-15 21:33:08,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:33:08,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:08,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:33:08,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1242, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:33:08,063 INFO L87 Difference]: Start difference. First operand 212 states and 527 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 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 21:33:08,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:08,721 INFO L93 Difference]: Finished difference Result 381 states and 820 transitions. [2022-03-15 21:33:08,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:33:08,721 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 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 21:33:08,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:08,722 INFO L225 Difference]: With dead ends: 381 [2022-03-15 21:33:08,722 INFO L226 Difference]: Without dead ends: 373 [2022-03-15 21:33:08,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=687, Invalid=3095, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:33:08,723 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 126 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:08,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 0 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-03-15 21:33:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 189. [2022-03-15 21:33:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.478723404255319) internal successors, (466), 188 states have internal predecessors, (466), 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 21:33:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 466 transitions. [2022-03-15 21:33:08,728 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 466 transitions. Word has length 18 [2022-03-15 21:33:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:08,728 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 466 transitions. [2022-03-15 21:33:08,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 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 21:33:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 466 transitions. [2022-03-15 21:33:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:33:08,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:08,729 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:08,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:08,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:08,929 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:08,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1333125459, now seen corresponding path program 33 times [2022-03-15 21:33:08,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:08,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797843455] [2022-03-15 21:33:08,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:08,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:09,041 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:09,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:09,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797843455] [2022-03-15 21:33:09,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797843455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:09,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078835594] [2022-03-15 21:33:09,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:09,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:09,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:09,056 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:09,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 21:33:09,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:33:09,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:09,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:33:09,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:09,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:09,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078835594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:09,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:09,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 33 [2022-03-15 21:33:09,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [394931335] [2022-03-15 21:33:09,736 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:09,737 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:09,738 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2022-03-15 21:33:09,738 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:09,810 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [17859#(< j1 M1), 17858#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:33:09,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:33:09,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:09,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:33:09,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1039, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:33:09,811 INFO L87 Difference]: Start difference. First operand 189 states and 466 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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 21:33:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:10,042 INFO L93 Difference]: Finished difference Result 456 states and 980 transitions. [2022-03-15 21:33:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:33:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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 21:33:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:10,044 INFO L225 Difference]: With dead ends: 456 [2022-03-15 21:33:10,044 INFO L226 Difference]: Without dead ends: 452 [2022-03-15 21:33:10,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=394, Invalid=1676, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:33:10,045 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:10,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 0 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:10,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-15 21:33:10,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 251. [2022-03-15 21:33:10,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.58) internal successors, (645), 250 states have internal predecessors, (645), 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 21:33:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 645 transitions. [2022-03-15 21:33:10,049 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 645 transitions. Word has length 18 [2022-03-15 21:33:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:10,049 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 645 transitions. [2022-03-15 21:33:10,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 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 21:33:10,049 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 645 transitions. [2022-03-15 21:33:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:33:10,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:10,050 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:10,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:10,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-15 21:33:10,254 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:10,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:10,254 INFO L85 PathProgramCache]: Analyzing trace with hash 2088101157, now seen corresponding path program 34 times [2022-03-15 21:33:10,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:10,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551765724] [2022-03-15 21:33:10,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:10,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:10,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:10,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:10,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551765724] [2022-03-15 21:33:10,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551765724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:10,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042314845] [2022-03-15 21:33:10,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:10,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:10,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:10,351 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:10,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 21:33:10,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:10,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:10,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 21:33:10,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:10,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:10,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042314845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:10,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:10,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2022-03-15 21:33:10,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [612385709] [2022-03-15 21:33:10,888 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:10,889 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:10,890 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 21:33:10,890 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:11,009 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [18973#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 18974#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 18975#(< j1 M1)] [2022-03-15 21:33:11,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:33:11,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:11,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:33:11,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1056, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:33:11,010 INFO L87 Difference]: Start difference. First operand 251 states and 645 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:11,263 INFO L93 Difference]: Finished difference Result 435 states and 946 transitions. [2022-03-15 21:33:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 21:33:11,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:33:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:11,264 INFO L225 Difference]: With dead ends: 435 [2022-03-15 21:33:11,264 INFO L226 Difference]: Without dead ends: 429 [2022-03-15 21:33:11,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:33:11,265 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 110 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:11,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 0 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-03-15 21:33:11,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 248. [2022-03-15 21:33:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.5587044534412957) internal successors, (632), 247 states have internal predecessors, (632), 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 21:33:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 632 transitions. [2022-03-15 21:33:11,269 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 632 transitions. Word has length 18 [2022-03-15 21:33:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:11,269 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 632 transitions. [2022-03-15 21:33:11,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:11,269 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 632 transitions. [2022-03-15 21:33:11,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:33:11,270 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:11,270 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:11,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-15 21:33:11,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-15 21:33:11,476 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:11,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:11,476 INFO L85 PathProgramCache]: Analyzing trace with hash 771943853, now seen corresponding path program 35 times [2022-03-15 21:33:11,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:11,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145753390] [2022-03-15 21:33:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:11,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:11,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:11,582 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:11,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145753390] [2022-03-15 21:33:11,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145753390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:11,582 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847667691] [2022-03-15 21:33:11,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:11,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:11,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:11,584 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:11,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 21:33:11,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:33:11,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:11,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 21:33:11,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:11,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:12,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847667691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:12,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:12,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-03-15 21:33:12,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1956418127] [2022-03-15 21:33:12,116 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:12,117 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:12,118 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2022-03-15 21:33:12,119 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:12,317 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [20067#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 20070#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 20069#(< j1 M1), 20068#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:33:12,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:33:12,317 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:12,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:33:12,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:33:12,318 INFO L87 Difference]: Start difference. First operand 248 states and 632 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21:33:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:12,610 INFO L93 Difference]: Finished difference Result 352 states and 774 transitions. [2022-03-15 21:33:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:33:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 18 [2022-03-15 21:33:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:12,612 INFO L225 Difference]: With dead ends: 352 [2022-03-15 21:33:12,612 INFO L226 Difference]: Without dead ends: 344 [2022-03-15 21:33:12,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=367, Invalid=1889, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:33:12,613 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 94 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:12,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 0 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:12,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-15 21:33:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 215. [2022-03-15 21:33:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.4766355140186915) internal successors, (530), 214 states have internal predecessors, (530), 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 21:33:12,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 530 transitions. [2022-03-15 21:33:12,616 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 530 transitions. Word has length 18 [2022-03-15 21:33:12,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:12,616 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 530 transitions. [2022-03-15 21:33:12,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 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 21:33:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 530 transitions. [2022-03-15 21:33:12,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:33:12,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:12,617 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:12,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:12,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 21:33:12,831 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:12,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1374226907, now seen corresponding path program 36 times [2022-03-15 21:33:12,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:12,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527875057] [2022-03-15 21:33:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:12,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:12,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:12,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:12,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527875057] [2022-03-15 21:33:12,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527875057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:12,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876608485] [2022-03-15 21:33:12,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:12,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:12,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:12,943 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:12,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 21:33:12,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:33:12,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:12,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 21:33:12,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:13,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:13,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876608485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:13,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:13,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2022-03-15 21:33:13,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1274238] [2022-03-15 21:33:13,494 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:13,494 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:13,496 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2022-03-15 21:33:13,496 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:13,781 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [21011#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 21014#(< j1 M1), 21013#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 21010#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 21012#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:33:13,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:33:13,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:13,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:33:13,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:33:13,785 INFO L87 Difference]: Start difference. First operand 215 states and 530 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 21:33:14,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:14,216 INFO L93 Difference]: Finished difference Result 347 states and 731 transitions. [2022-03-15 21:33:14,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:33:14,216 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 18 [2022-03-15 21:33:14,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:14,217 INFO L225 Difference]: With dead ends: 347 [2022-03-15 21:33:14,217 INFO L226 Difference]: Without dead ends: 329 [2022-03-15 21:33:14,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=549, Invalid=2531, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:33:14,218 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:14,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:14,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-03-15 21:33:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 225. [2022-03-15 21:33:14,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.4776785714285716) internal successors, (555), 224 states have internal predecessors, (555), 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 21:33:14,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 555 transitions. [2022-03-15 21:33:14,221 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 555 transitions. Word has length 18 [2022-03-15 21:33:14,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:14,221 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 555 transitions. [2022-03-15 21:33:14,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 21:33:14,221 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 555 transitions. [2022-03-15 21:33:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:33:14,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:14,222 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:14,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:14,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:14,437 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:14,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:14,438 INFO L85 PathProgramCache]: Analyzing trace with hash -124779998, now seen corresponding path program 37 times [2022-03-15 21:33:14,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:14,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849728527] [2022-03-15 21:33:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:14,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:14,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:14,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849728527] [2022-03-15 21:33:14,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849728527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:14,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345307085] [2022-03-15 21:33:14,536 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:14,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:14,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:14,537 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:14,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 21:33:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:14,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 21:33:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:14,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:14,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:15,100 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:15,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345307085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:15,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:15,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2022-03-15 21:33:15,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [525554099] [2022-03-15 21:33:15,101 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:15,101 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:15,104 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 57 transitions. [2022-03-15 21:33:15,104 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:15,512 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [21995#(or (< j1 M1) (<= (+ 5 j2) M2)), 22002#(or (<= (+ 6 j2) M2) (<= M1 (+ 5 j1)) (< (+ 6 j1) M1)), 21991#(or (< j1 M1) (<= (+ j2 1) M2)), 21990#(< j1 M1), 21992#(or (< j1 M1) (<= (+ 2 j2) M2)), 21994#(or (< j1 M1) (<= (+ j2 4) M2)), 22001#(or (<= (+ 6 j2) M2) (< (+ 5 j1) M1) (<= M1 (+ j1 4))), 21998#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ 6 j2) M2)), 22000#(or (<= M1 (+ 3 j1)) (<= (+ 6 j2) M2) (< (+ j1 4) M1)), 21993#(or (< j1 M1) (<= (+ 3 j2) M2)), 21997#(or (<= (+ 6 j2) M2) (< (+ j1 1) M1) (<= M1 j1)), 21996#(or (<= (+ 6 j2) M2) (< j1 M1)), 21999#(or (<= M1 (+ 2 j1)) (<= (+ 6 j2) M2) (< (+ 3 j1) M1))] [2022-03-15 21:33:15,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:33:15,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:15,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:33:15,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=2064, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:33:15,513 INFO L87 Difference]: Start difference. First operand 225 states and 555 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 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 21:33:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:16,016 INFO L93 Difference]: Finished difference Result 382 states and 818 transitions. [2022-03-15 21:33:16,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:33:16,016 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 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 21:33:16,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:16,017 INFO L225 Difference]: With dead ends: 382 [2022-03-15 21:33:16,017 INFO L226 Difference]: Without dead ends: 350 [2022-03-15 21:33:16,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1165, Invalid=4091, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:33:16,018 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 146 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:16,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 0 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:16,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-03-15 21:33:16,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 225. [2022-03-15 21:33:16,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.4598214285714284) internal successors, (551), 224 states have internal predecessors, (551), 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 21:33:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 551 transitions. [2022-03-15 21:33:16,022 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 551 transitions. Word has length 19 [2022-03-15 21:33:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:16,022 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 551 transitions. [2022-03-15 21:33:16,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 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 21:33:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 551 transitions. [2022-03-15 21:33:16,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:33:16,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:16,022 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:16,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-15 21:33:16,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 21:33:16,227 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:16,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:16,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1828083558, now seen corresponding path program 38 times [2022-03-15 21:33:16,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:16,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046503061] [2022-03-15 21:33:16,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:16,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:16,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:16,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:16,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046503061] [2022-03-15 21:33:16,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046503061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:16,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819828101] [2022-03-15 21:33:16,293 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:16,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:16,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:16,294 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:16,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 21:33:16,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:16,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:16,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 21:33:16,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:16,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:16,889 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:16,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819828101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:16,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:16,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 31 [2022-03-15 21:33:16,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [284911] [2022-03-15 21:33:16,889 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:16,890 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:16,892 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2022-03-15 21:33:16,892 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:17,047 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [23020#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= (+ j2 4) j1) (<= M1 j1))), 23019#(< j2 M2), 23024#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 4))) (or (<= j2 j1) (<= M1 (+ j1 4)))), 23022#(and (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M1 (+ 2 j1)) (<= (+ 2 j2) j1))), 23023#(and (or (<= M1 (+ 3 j1)) (<= (+ j2 1) j1)) (or (<= M1 (+ 3 j1)) (= (+ (* (- 1) M1) M2) 0))), 23021#(and (or (<= M1 (+ j1 1)) (<= (+ 3 j2) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 21:33:17,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:33:17,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:17,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:33:17,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=1067, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:33:17,048 INFO L87 Difference]: Start difference. First operand 225 states and 551 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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 21:33:17,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:17,288 INFO L93 Difference]: Finished difference Result 275 states and 634 transitions. [2022-03-15 21:33:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:33:17,288 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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 19 [2022-03-15 21:33:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:17,289 INFO L225 Difference]: With dead ends: 275 [2022-03-15 21:33:17,289 INFO L226 Difference]: Without dead ends: 274 [2022-03-15 21:33:17,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=743, Invalid=2119, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:33:17,290 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:17,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:17,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-03-15 21:33:17,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 225. [2022-03-15 21:33:17,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.455357142857143) internal successors, (550), 224 states have internal predecessors, (550), 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 21:33:17,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 550 transitions. [2022-03-15 21:33:17,293 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 550 transitions. Word has length 19 [2022-03-15 21:33:17,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:17,293 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 550 transitions. [2022-03-15 21:33:17,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 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 21:33:17,293 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 550 transitions. [2022-03-15 21:33:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:17,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:17,294 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:17,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:17,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-15 21:33:17,510 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:17,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:17,510 INFO L85 PathProgramCache]: Analyzing trace with hash 426644955, now seen corresponding path program 39 times [2022-03-15 21:33:17,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:17,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604678510] [2022-03-15 21:33:17,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:17,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:17,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:17,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604678510] [2022-03-15 21:33:17,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604678510] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:17,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346176340] [2022-03-15 21:33:17,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:17,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:17,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:17,604 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:17,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 21:33:17,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:33:17,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:17,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:33:17,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:17,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:17,919 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:17,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346176340] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:17,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:17,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 17 [2022-03-15 21:33:17,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [489014157] [2022-03-15 21:33:17,920 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:17,921 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:17,923 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 62 transitions. [2022-03-15 21:33:17,923 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:18,231 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:33:18,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:33:18,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:18,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:33:18,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:33:18,232 INFO L87 Difference]: Start difference. First operand 225 states and 550 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 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 21:33:18,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:18,347 INFO L93 Difference]: Finished difference Result 374 states and 854 transitions. [2022-03-15 21:33:18,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:33:18,348 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 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 21:33:18,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:18,349 INFO L225 Difference]: With dead ends: 374 [2022-03-15 21:33:18,349 INFO L226 Difference]: Without dead ends: 356 [2022-03-15 21:33:18,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:33:18,349 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 28 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:18,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 0 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:18,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-03-15 21:33:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 280. [2022-03-15 21:33:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.5017921146953404) internal successors, (698), 279 states have internal predecessors, (698), 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 21:33:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 698 transitions. [2022-03-15 21:33:18,353 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 698 transitions. Word has length 20 [2022-03-15 21:33:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:18,354 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 698 transitions. [2022-03-15 21:33:18,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 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 21:33:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 698 transitions. [2022-03-15 21:33:18,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:18,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:18,354 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:18,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:18,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:18,570 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:18,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:18,571 INFO L85 PathProgramCache]: Analyzing trace with hash -978560007, now seen corresponding path program 40 times [2022-03-15 21:33:18,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:18,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544413810] [2022-03-15 21:33:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:18,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:18,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:18,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544413810] [2022-03-15 21:33:18,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544413810] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:18,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599870103] [2022-03-15 21:33:18,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:18,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:18,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:18,721 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:18,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 21:33:18,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:18,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:18,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:33:18,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:19,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:20,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599870103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:20,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:20,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 36 [2022-03-15 21:33:20,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1675579112] [2022-03-15 21:33:20,198 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:20,199 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:20,201 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:33:20,201 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:20,529 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [25006#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 25001#(and (or (not (< j1 M1)) (<= 4 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter 4) (not (< j1 M1))) (or (not (< j1 M1)) (<= (+ j2 4) j1))), 25003#(and (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 2 counter) (not (< (+ 2 j1) M1))) (or (<= counter 2) (not (< (+ 2 j1) M1)))), 25000#(< j1 M1), 25005#(and (or (not (< (+ 3 j1) M1)) (<= counter 1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= 1 counter))), 25002#(and (or (<= counter 3) (not (< (+ j1 1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= 3 counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 25004#(or (< (+ j1 1) M1) (<= M1 j1))] [2022-03-15 21:33:20,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:33:20,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:33:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1518, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:33:20,530 INFO L87 Difference]: Start difference. First operand 280 states and 698 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 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 21:33:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:21,614 INFO L93 Difference]: Finished difference Result 481 states and 1049 transitions. [2022-03-15 21:33:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:33:21,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 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 20 [2022-03-15 21:33:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:21,616 INFO L225 Difference]: With dead ends: 481 [2022-03-15 21:33:21,616 INFO L226 Difference]: Without dead ends: 478 [2022-03-15 21:33:21,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=861, Invalid=3299, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:33:21,617 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 126 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:21,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 0 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:33:21,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-03-15 21:33:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 276. [2022-03-15 21:33:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.5163636363636366) internal successors, (692), 275 states have internal predecessors, (692), 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 21:33:21,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 692 transitions. [2022-03-15 21:33:21,621 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 692 transitions. Word has length 20 [2022-03-15 21:33:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:21,621 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 692 transitions. [2022-03-15 21:33:21,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 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 21:33:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 692 transitions. [2022-03-15 21:33:21,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:21,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:21,622 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:21,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-15 21:33:21,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 21:33:21,829 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:21,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash -585865463, now seen corresponding path program 41 times [2022-03-15 21:33:21,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:21,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035430607] [2022-03-15 21:33:21,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:21,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:21,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:21,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035430607] [2022-03-15 21:33:21,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035430607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:21,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845206586] [2022-03-15 21:33:21,975 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:21,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:21,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:21,977 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:21,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 21:33:22,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:33:22,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:22,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:33:22,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:22,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:23,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845206586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:23,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:23,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 37 [2022-03-15 21:33:23,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [51319971] [2022-03-15 21:33:23,337 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:23,338 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:23,340 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:33:23,340 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:23,651 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [26238#(< j1 M1), 26235#(and (or (<= 2 counter) (not (< (+ j1 1) M1))) (or (<= counter 2) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 26237#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 26236#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ 2 j1) M1))) (or (<= 1 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 26239#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 26234#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter 3)) (or (not (< j1 M1)) (<= 3 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 21:33:23,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:33:23,651 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:23,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:33:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=1550, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:33:23,652 INFO L87 Difference]: Start difference. First operand 276 states and 692 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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 21:33:25,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:25,457 INFO L93 Difference]: Finished difference Result 735 states and 1516 transitions. [2022-03-15 21:33:25,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 21:33:25,457 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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 20 [2022-03-15 21:33:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:25,459 INFO L225 Difference]: With dead ends: 735 [2022-03-15 21:33:25,459 INFO L226 Difference]: Without dead ends: 731 [2022-03-15 21:33:25,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1265 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1279, Invalid=5363, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 21:33:25,463 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 154 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:25,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 0 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:33:25,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-15 21:33:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 272. [2022-03-15 21:33:25,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.5202952029520294) internal successors, (683), 271 states have internal predecessors, (683), 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 21:33:25,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 683 transitions. [2022-03-15 21:33:25,489 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 683 transitions. Word has length 20 [2022-03-15 21:33:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:25,489 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 683 transitions. [2022-03-15 21:33:25,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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 21:33:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 683 transitions. [2022-03-15 21:33:25,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:25,490 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:25,490 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:25,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:25,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:25,691 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:25,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash -464597255, now seen corresponding path program 42 times [2022-03-15 21:33:25,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:25,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455393835] [2022-03-15 21:33:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:25,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:25,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:25,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455393835] [2022-03-15 21:33:25,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455393835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:25,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140548804] [2022-03-15 21:33:25,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:25,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:25,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:25,854 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:25,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 21:33:25,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:33:25,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:25,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:33:25,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:26,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:26,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140548804] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:26,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:26,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2022-03-15 21:33:26,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [774849149] [2022-03-15 21:33:26,842 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:26,843 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:26,845 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 21:33:26,845 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:27,151 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [27749#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 27751#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 27750#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 27697#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 27752#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 27748#(< j1 M1)] [2022-03-15 21:33:27,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:33:27,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:27,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:33:27,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:33:27,151 INFO L87 Difference]: Start difference. First operand 272 states and 683 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 21:33:28,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:28,326 INFO L93 Difference]: Finished difference Result 802 states and 1655 transitions. [2022-03-15 21:33:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:33:28,326 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 20 [2022-03-15 21:33:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:28,329 INFO L225 Difference]: With dead ends: 802 [2022-03-15 21:33:28,329 INFO L226 Difference]: Without dead ends: 794 [2022-03-15 21:33:28,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1012, Invalid=4390, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:33:28,330 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 132 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:28,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 0 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-03-15 21:33:28,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 266. [2022-03-15 21:33:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.516981132075472) internal successors, (667), 265 states have internal predecessors, (667), 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 21:33:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 667 transitions. [2022-03-15 21:33:28,344 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 667 transitions. Word has length 20 [2022-03-15 21:33:28,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:28,344 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 667 transitions. [2022-03-15 21:33:28,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 21:33:28,344 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 667 transitions. [2022-03-15 21:33:28,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:28,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:28,349 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:28,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-15 21:33:28,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:28,550 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:28,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:28,552 INFO L85 PathProgramCache]: Analyzing trace with hash 302134793, now seen corresponding path program 43 times [2022-03-15 21:33:28,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:28,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350778726] [2022-03-15 21:33:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:28,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:28,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:28,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:28,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350778726] [2022-03-15 21:33:28,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350778726] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:28,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816907935] [2022-03-15 21:33:28,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:28,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:28,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:28,690 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:28,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 21:33:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:28,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:33:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:29,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:29,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:29,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816907935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:29,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:29,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2022-03-15 21:33:29,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1259370036] [2022-03-15 21:33:29,530 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:29,531 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:29,533 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 21:33:29,533 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:29,831 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [29303#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 29302#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 29301#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 29305#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 29250#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 29304#(< j1 M1)] [2022-03-15 21:33:29,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:33:29,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:29,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:33:29,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1666, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:33:29,832 INFO L87 Difference]: Start difference. First operand 266 states and 667 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:30,780 INFO L93 Difference]: Finished difference Result 799 states and 1654 transitions. [2022-03-15 21:33:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:33:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:33:30,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:30,782 INFO L225 Difference]: With dead ends: 799 [2022-03-15 21:33:30,782 INFO L226 Difference]: Without dead ends: 781 [2022-03-15 21:33:30,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=928, Invalid=4328, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:33:30,783 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 147 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:30,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 0 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:30,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-03-15 21:33:30,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 269. [2022-03-15 21:33:30,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.5111940298507465) internal successors, (673), 268 states have internal predecessors, (673), 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 21:33:30,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 673 transitions. [2022-03-15 21:33:30,788 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 673 transitions. Word has length 20 [2022-03-15 21:33:30,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:30,788 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 673 transitions. [2022-03-15 21:33:30,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:30,788 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 673 transitions. [2022-03-15 21:33:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:30,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:30,789 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:30,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:31,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-15 21:33:31,004 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:31,004 INFO L85 PathProgramCache]: Analyzing trace with hash -775212807, now seen corresponding path program 44 times [2022-03-15 21:33:31,005 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:31,005 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124442560] [2022-03-15 21:33:31,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:31,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:31,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:31,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124442560] [2022-03-15 21:33:31,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124442560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:31,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912989670] [2022-03-15 21:33:31,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:31,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:31,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:31,130 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:31,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 21:33:31,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:31,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:31,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:33:31,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:31,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:31,954 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:31,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912989670] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:31,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:31,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2022-03-15 21:33:31,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1602379633] [2022-03-15 21:33:31,954 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:31,955 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:31,957 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 21:33:31,957 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:32,154 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [30854#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 30852#(< j1 M1), 30801#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 30853#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 21:33:32,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:33:32,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:32,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:33:32,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:33:32,155 INFO L87 Difference]: Start difference. First operand 269 states and 673 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 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 21:33:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:32,844 INFO L93 Difference]: Finished difference Result 671 states and 1470 transitions. [2022-03-15 21:33:32,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:33:32,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 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 21:33:32,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:32,846 INFO L225 Difference]: With dead ends: 671 [2022-03-15 21:33:32,846 INFO L226 Difference]: Without dead ends: 665 [2022-03-15 21:33:32,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=790, Invalid=3500, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:33:32,847 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 144 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:32,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 0 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-03-15 21:33:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 346. [2022-03-15 21:33:32,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 2.591304347826087) internal successors, (894), 345 states have internal predecessors, (894), 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 21:33:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 894 transitions. [2022-03-15 21:33:32,852 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 894 transitions. Word has length 20 [2022-03-15 21:33:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:32,852 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 894 transitions. [2022-03-15 21:33:32,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 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 21:33:32,852 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 894 transitions. [2022-03-15 21:33:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:32,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:32,853 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:32,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-15 21:33:33,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-15 21:33:33,059 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:33,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:33,059 INFO L85 PathProgramCache]: Analyzing trace with hash -2091370111, now seen corresponding path program 45 times [2022-03-15 21:33:33,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:33,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200522906] [2022-03-15 21:33:33,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:33,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:33,189 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:33,189 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:33,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200522906] [2022-03-15 21:33:33,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200522906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:33,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920388591] [2022-03-15 21:33:33,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:33,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:33,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:33,191 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:33,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 21:33:33,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:33:33,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:33,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:33:33,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:33,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:34,030 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:34,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920388591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:34,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:34,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 41 [2022-03-15 21:33:34,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1472700348] [2022-03-15 21:33:34,030 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:34,031 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:34,033 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 38 transitions. [2022-03-15 21:33:34,033 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:34,283 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [32422#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 32425#(< j1 M1), 32423#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 32424#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 32426#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 21:33:34,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:33:34,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:34,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:33:34,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1834, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:33:34,284 INFO L87 Difference]: Start difference. First operand 346 states and 894 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 21:33:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:34,907 INFO L93 Difference]: Finished difference Result 531 states and 1189 transitions. [2022-03-15 21:33:34,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:33:34,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 20 [2022-03-15 21:33:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:34,909 INFO L225 Difference]: With dead ends: 531 [2022-03-15 21:33:34,909 INFO L226 Difference]: Without dead ends: 523 [2022-03-15 21:33:34,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1181 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=752, Invalid=3670, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:33:34,909 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 133 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:34,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 0 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-03-15 21:33:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 302. [2022-03-15 21:33:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.514950166112957) internal successors, (757), 301 states have internal predecessors, (757), 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 21:33:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 757 transitions. [2022-03-15 21:33:34,914 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 757 transitions. Word has length 20 [2022-03-15 21:33:34,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:34,914 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 757 transitions. [2022-03-15 21:33:34,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 19 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 21:33:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 757 transitions. [2022-03-15 21:33:34,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:34,915 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:34,915 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:34,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:35,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-15 21:33:35,131 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:35,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash 57426425, now seen corresponding path program 46 times [2022-03-15 21:33:35,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:35,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437449016] [2022-03-15 21:33:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:35,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:35,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:35,293 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:35,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:35,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437449016] [2022-03-15 21:33:35,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437449016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:35,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997987281] [2022-03-15 21:33:35,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:35,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:35,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:35,295 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:35,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 21:33:35,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:35,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:35,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:33:35,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:35,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:36,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997987281] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:36,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:36,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 42 [2022-03-15 21:33:36,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [828353400] [2022-03-15 21:33:36,127 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:36,128 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:36,130 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 42 transitions. [2022-03-15 21:33:36,130 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:36,449 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [33760#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 33761#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 33763#(< j1 M1), 33764#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 33759#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 33762#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:33:36,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:33:36,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:36,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:33:36,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1976, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:33:36,449 INFO L87 Difference]: Start difference. First operand 302 states and 757 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 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 21:33:37,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:37,275 INFO L93 Difference]: Finished difference Result 509 states and 1116 transitions. [2022-03-15 21:33:37,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:33:37,275 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 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 21:33:37,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:37,277 INFO L225 Difference]: With dead ends: 509 [2022-03-15 21:33:37,277 INFO L226 Difference]: Without dead ends: 499 [2022-03-15 21:33:37,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1026, Invalid=4674, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:33:37,277 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 172 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:37,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 0 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-03-15 21:33:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 271. [2022-03-15 21:33:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.5074074074074075) internal successors, (677), 270 states have internal predecessors, (677), 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 21:33:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 677 transitions. [2022-03-15 21:33:37,281 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 677 transitions. Word has length 20 [2022-03-15 21:33:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:37,281 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 677 transitions. [2022-03-15 21:33:37,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 21 states have internal predecessors, (37), 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 21:33:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 677 transitions. [2022-03-15 21:33:37,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:37,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:37,282 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:37,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:37,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:37,483 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:37,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:37,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1105582327, now seen corresponding path program 47 times [2022-03-15 21:33:37,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:37,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347894001] [2022-03-15 21:33:37,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:37,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:37,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:37,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:37,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347894001] [2022-03-15 21:33:37,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347894001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:37,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833605049] [2022-03-15 21:33:37,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:37,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:37,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:37,588 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:37,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 21:33:37,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:33:37,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:37,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:33:37,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:37,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:38,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833605049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:38,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:38,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 36 [2022-03-15 21:33:38,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [171618318] [2022-03-15 21:33:38,324 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:38,325 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:38,327 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2022-03-15 21:33:38,327 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:38,389 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [35021#(< j1 M1), 35022#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:33:38,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:33:38,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:38,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:33:38,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1216, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:33:38,390 INFO L87 Difference]: Start difference. First operand 271 states and 677 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:33:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:38,671 INFO L93 Difference]: Finished difference Result 639 states and 1390 transitions. [2022-03-15 21:33:38,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:33:38,672 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 20 [2022-03-15 21:33:38,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:38,674 INFO L225 Difference]: With dead ends: 639 [2022-03-15 21:33:38,674 INFO L226 Difference]: Without dead ends: 635 [2022-03-15 21:33:38,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=505, Invalid=2147, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:33:38,674 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 102 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:38,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 0 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-03-15 21:33:38,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 353. [2022-03-15 21:33:38,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.59375) internal successors, (913), 352 states have internal predecessors, (913), 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 21:33:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 913 transitions. [2022-03-15 21:33:38,682 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 913 transitions. Word has length 20 [2022-03-15 21:33:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:38,683 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 913 transitions. [2022-03-15 21:33:38,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 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 21:33:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 913 transitions. [2022-03-15 21:33:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:38,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:38,687 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:38,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:38,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-15 21:33:38,887 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:38,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1979323007, now seen corresponding path program 48 times [2022-03-15 21:33:38,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:38,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596006518] [2022-03-15 21:33:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:38,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:38,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:38,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:38,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596006518] [2022-03-15 21:33:38,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596006518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:38,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728140062] [2022-03-15 21:33:38,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:38,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:38,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:38,996 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:38,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 21:33:39,022 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:33:39,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:39,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:33:39,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:39,305 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:39,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:39,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728140062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:39,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:39,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 37 [2022-03-15 21:33:39,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1857337882] [2022-03-15 21:33:39,697 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:39,698 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:39,700 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 21:33:39,700 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:39,842 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [36547#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 36546#(< j1 M1), 36548#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:33:39,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:33:39,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:39,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:33:39,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=1376, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:33:39,843 INFO L87 Difference]: Start difference. First operand 353 states and 913 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 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 21:33:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:40,195 INFO L93 Difference]: Finished difference Result 642 states and 1404 transitions. [2022-03-15 21:33:40,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:33:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 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 21:33:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:40,198 INFO L225 Difference]: With dead ends: 642 [2022-03-15 21:33:40,198 INFO L226 Difference]: Without dead ends: 636 [2022-03-15 21:33:40,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=557, Invalid=2635, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:33:40,198 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 108 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:40,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 0 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:40,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2022-03-15 21:33:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 353. [2022-03-15 21:33:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.5823863636363638) internal successors, (909), 352 states have internal predecessors, (909), 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 21:33:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 909 transitions. [2022-03-15 21:33:40,204 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 909 transitions. Word has length 20 [2022-03-15 21:33:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:40,204 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 909 transitions. [2022-03-15 21:33:40,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 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 21:33:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 909 transitions. [2022-03-15 21:33:40,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:40,205 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:40,205 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:40,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:40,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 21:33:40,421 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:40,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash 999486985, now seen corresponding path program 49 times [2022-03-15 21:33:40,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:40,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668518769] [2022-03-15 21:33:40,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:40,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:40,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:40,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668518769] [2022-03-15 21:33:40,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668518769] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:40,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483120767] [2022-03-15 21:33:40,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:40,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:40,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:40,536 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:40,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 21:33:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:40,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:33:40,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:40,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:41,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483120767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:41,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:41,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 38 [2022-03-15 21:33:41,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1459792051] [2022-03-15 21:33:41,196 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:41,197 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:41,199 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 36 transitions. [2022-03-15 21:33:41,199 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:41,390 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [38082#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 38085#(< j1 M1), 38084#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 38083#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:33:41,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:33:41,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:41,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:33:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1530, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:33:41,391 INFO L87 Difference]: Start difference. First operand 353 states and 909 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 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 21:33:41,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:41,753 INFO L93 Difference]: Finished difference Result 581 states and 1286 transitions. [2022-03-15 21:33:41,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:33:41,753 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 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 21:33:41,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:41,755 INFO L225 Difference]: With dead ends: 581 [2022-03-15 21:33:41,755 INFO L226 Difference]: Without dead ends: 573 [2022-03-15 21:33:41,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=548, Invalid=2758, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:33:41,755 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 126 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:41,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 0 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-03-15 21:33:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 347. [2022-03-15 21:33:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.5635838150289016) internal successors, (887), 346 states have internal predecessors, (887), 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 21:33:41,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 887 transitions. [2022-03-15 21:33:41,760 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 887 transitions. Word has length 20 [2022-03-15 21:33:41,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:41,760 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 887 transitions. [2022-03-15 21:33:41,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 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 21:33:41,760 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 887 transitions. [2022-03-15 21:33:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:41,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:41,761 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:41,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-03-15 21:33:41,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:41,961 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1146683775, now seen corresponding path program 50 times [2022-03-15 21:33:41,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:41,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867422525] [2022-03-15 21:33:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:41,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:33:42,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:42,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867422525] [2022-03-15 21:33:42,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867422525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:42,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400387655] [2022-03-15 21:33:42,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:42,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:42,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:42,086 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:42,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 21:33:42,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:42,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:42,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:33:42,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:42,426 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:42,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:42,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [400387655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:42,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:42,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 39 [2022-03-15 21:33:42,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1444412144] [2022-03-15 21:33:42,781 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:42,782 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:42,784 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 21:33:42,784 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:43,048 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [39546#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 39548#(< j1 M1), 39547#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 39494#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 39545#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:33:43,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:33:43,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:43,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:33:43,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:33:43,048 INFO L87 Difference]: Start difference. First operand 347 states and 887 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 21:33:43,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:43,400 INFO L93 Difference]: Finished difference Result 470 states and 1056 transitions. [2022-03-15 21:33:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:33:43,400 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 20 [2022-03-15 21:33:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:43,402 INFO L225 Difference]: With dead ends: 470 [2022-03-15 21:33:43,402 INFO L226 Difference]: Without dead ends: 460 [2022-03-15 21:33:43,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1027 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=481, Invalid=2599, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:33:43,402 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 125 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:43,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 0 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-03-15 21:33:43,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 305. [2022-03-15 21:33:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.4967105263157894) internal successors, (759), 304 states have internal predecessors, (759), 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 21:33:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 759 transitions. [2022-03-15 21:33:43,406 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 759 transitions. Word has length 20 [2022-03-15 21:33:43,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:43,406 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 759 transitions. [2022-03-15 21:33:43,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 21:33:43,406 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 759 transitions. [2022-03-15 21:33:43,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:33:43,407 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:43,407 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:43,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:43,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 21:33:43,623 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:43,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1041499401, now seen corresponding path program 51 times [2022-03-15 21:33:43,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:43,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050911336] [2022-03-15 21:33:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:43,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:43,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:43,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050911336] [2022-03-15 21:33:43,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050911336] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:43,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329657633] [2022-03-15 21:33:43,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:33:43,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:43,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:43,763 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:43,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 21:33:43,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:33:43,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:43,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:33:43,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:44,099 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:44,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:44,446 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:44,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329657633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:44,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:44,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 40 [2022-03-15 21:33:44,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1924158019] [2022-03-15 21:33:44,447 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:44,448 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:44,450 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 44 transitions. [2022-03-15 21:33:44,450 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:44,789 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [40808#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 40811#(< j1 M1), 40810#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 40812#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 40757#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 40809#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:33:44,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:33:44,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:33:44,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1741, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:33:44,790 INFO L87 Difference]: Start difference. First operand 305 states and 759 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 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 21:33:45,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:45,339 INFO L93 Difference]: Finished difference Result 460 states and 996 transitions. [2022-03-15 21:33:45,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:33:45,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 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 21:33:45,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:45,341 INFO L225 Difference]: With dead ends: 460 [2022-03-15 21:33:45,341 INFO L226 Difference]: Without dead ends: 438 [2022-03-15 21:33:45,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=720, Invalid=3440, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:33:45,341 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 122 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:45,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 0 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-03-15 21:33:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 317. [2022-03-15 21:33:45,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.4968354430379747) internal successors, (789), 316 states have internal predecessors, (789), 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 21:33:45,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 789 transitions. [2022-03-15 21:33:45,345 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 789 transitions. Word has length 20 [2022-03-15 21:33:45,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:45,345 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 789 transitions. [2022-03-15 21:33:45,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 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 21:33:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 789 transitions. [2022-03-15 21:33:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:33:45,346 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:45,346 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:45,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-15 21:33:45,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:45,559 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:45,559 INFO L85 PathProgramCache]: Analyzing trace with hash -957350082, now seen corresponding path program 52 times [2022-03-15 21:33:45,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:45,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261424860] [2022-03-15 21:33:45,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:45,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:45,685 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:45,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261424860] [2022-03-15 21:33:45,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261424860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:45,685 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307765269] [2022-03-15 21:33:45,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:33:45,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:45,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:45,689 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:45,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 21:33:45,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:33:45,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:45,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 21:33:45,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:45,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:46,386 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:46,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307765269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:46,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:46,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2022-03-15 21:33:46,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [863571299] [2022-03-15 21:33:46,386 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:46,387 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:46,391 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 65 transitions. [2022-03-15 21:33:46,391 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:46,929 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 15 new interpolants: [42123#(or (<= (+ 7 j2) M2) (< (+ 7 j1) M1) (<= M1 (+ 6 j1))), 42109#(< j1 M1), 42117#(or (<= (+ 7 j2) M2) (< (+ j1 1) M1) (<= M1 j1)), 42114#(or (< j1 M1) (<= (+ 5 j2) M2)), 42122#(or (<= (+ 7 j2) M2) (<= M1 (+ 5 j1)) (< (+ 6 j1) M1)), 42113#(or (< j1 M1) (<= (+ j2 4) M2)), 42111#(or (< j1 M1) (<= (+ 2 j2) M2)), 42121#(or (<= (+ 7 j2) M2) (< (+ 5 j1) M1) (<= M1 (+ j1 4))), 42115#(or (<= (+ 6 j2) M2) (< j1 M1)), 42119#(or (<= M1 (+ 2 j1)) (<= (+ 7 j2) M2) (< (+ 3 j1) M1)), 42118#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ 7 j2) M2)), 42116#(or (<= (+ 7 j2) M2) (< j1 M1)), 42112#(or (< j1 M1) (<= (+ 3 j2) M2)), 42110#(or (< j1 M1) (<= (+ j2 1) M2)), 42120#(or (<= M1 (+ 3 j1)) (<= (+ 7 j2) M2) (< (+ j1 4) M1))] [2022-03-15 21:33:46,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:33:46,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:46,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:33:46,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=633, Invalid=2789, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:33:46,930 INFO L87 Difference]: Start difference. First operand 317 states and 789 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 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 21:33:47,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:47,603 INFO L93 Difference]: Finished difference Result 510 states and 1113 transitions. [2022-03-15 21:33:47,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:33:47,604 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 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 21:33:47,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:47,605 INFO L225 Difference]: With dead ends: 510 [2022-03-15 21:33:47,605 INFO L226 Difference]: Without dead ends: 470 [2022-03-15 21:33:47,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1570, Invalid=5570, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 21:33:47,606 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 153 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:47,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 0 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-15 21:33:47,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 316. [2022-03-15 21:33:47,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.4825396825396826) internal successors, (782), 315 states have internal predecessors, (782), 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 21:33:47,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 782 transitions. [2022-03-15 21:33:47,610 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 782 transitions. Word has length 21 [2022-03-15 21:33:47,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:47,610 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 782 transitions. [2022-03-15 21:33:47,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 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 21:33:47,610 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 782 transitions. [2022-03-15 21:33:47,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:33:47,611 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:47,611 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:47,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:47,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-15 21:33:47,820 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:47,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:47,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1962135982, now seen corresponding path program 53 times [2022-03-15 21:33:47,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:47,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547584890] [2022-03-15 21:33:47,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:47,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:47,929 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:47,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547584890] [2022-03-15 21:33:47,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547584890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:47,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819885153] [2022-03-15 21:33:47,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:33:47,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:47,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:47,931 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:47,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 21:33:47,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:33:47,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:47,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:33:47,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:48,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:48,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819885153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:48,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:48,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 15] total 36 [2022-03-15 21:33:48,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [293088929] [2022-03-15 21:33:48,672 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:48,673 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:48,676 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 39 transitions. [2022-03-15 21:33:48,676 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:48,909 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [43475#(and (or (<= (+ 5 j2) j1) (<= M1 j1)) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1))), 43481#(< j2 M2), 43480#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 5 j1))) (or (<= j2 j1) (<= M1 (+ 5 j1)))), 43477#(and (or (<= M1 (+ 2 j1)) (<= (+ 3 j2) j1)) (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0))), 43478#(and (or (<= M1 (+ 3 j1)) (<= (+ 2 j2) j1)) (or (<= M1 (+ 3 j1)) (= (+ (* (- 1) M1) M2) 0))), 43479#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 4))) (or (<= M1 (+ j1 4)) (<= (+ j2 1) j1))), 43476#(and (or (<= M1 (+ j1 1)) (<= (+ j2 4) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 21:33:48,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:33:48,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:33:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1463, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:33:48,909 INFO L87 Difference]: Start difference. First operand 316 states and 782 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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 21:33:49,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:49,230 INFO L93 Difference]: Finished difference Result 378 states and 887 transitions. [2022-03-15 21:33:49,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:33:49,231 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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 21:33:49,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:49,232 INFO L225 Difference]: With dead ends: 378 [2022-03-15 21:33:49,232 INFO L226 Difference]: Without dead ends: 377 [2022-03-15 21:33:49,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=982, Invalid=2924, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:33:49,233 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:49,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:33:49,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-15 21:33:49,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 316. [2022-03-15 21:33:49,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.4793650793650794) internal successors, (781), 315 states have internal predecessors, (781), 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 21:33:49,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 781 transitions. [2022-03-15 21:33:49,245 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 781 transitions. Word has length 21 [2022-03-15 21:33:49,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:49,245 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 781 transitions. [2022-03-15 21:33:49,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 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 21:33:49,245 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 781 transitions. [2022-03-15 21:33:49,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:33:49,246 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:49,246 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:49,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 21:33:49,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 21:33:49,455 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:49,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:49,456 INFO L85 PathProgramCache]: Analyzing trace with hash 386776127, now seen corresponding path program 54 times [2022-03-15 21:33:49,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:49,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128030820] [2022-03-15 21:33:49,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:49,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:49,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:49,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128030820] [2022-03-15 21:33:49,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128030820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:49,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467683207] [2022-03-15 21:33:49,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:33:49,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:49,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:49,557 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:49,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 21:33:49,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:33:49,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:49,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:33:49,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:49,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:49,861 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:49,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467683207] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:49,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:49,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 19 [2022-03-15 21:33:49,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1000293967] [2022-03-15 21:33:49,861 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:49,863 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:49,866 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 70 transitions. [2022-03-15 21:33:49,866 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:50,212 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:33:50,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:33:50,213 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:50,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:33:50,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:33:50,213 INFO L87 Difference]: Start difference. First operand 316 states and 781 transitions. Second operand has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 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 21:33:50,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:50,375 INFO L93 Difference]: Finished difference Result 503 states and 1166 transitions. [2022-03-15 21:33:50,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:33:50,375 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 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 21:33:50,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:50,376 INFO L225 Difference]: With dead ends: 503 [2022-03-15 21:33:50,377 INFO L226 Difference]: Without dead ends: 483 [2022-03-15 21:33:50,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2022-03-15 21:33:50,377 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:50,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:33:50,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-03-15 21:33:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 387. [2022-03-15 21:33:50,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.523316062176166) internal successors, (974), 386 states have internal predecessors, (974), 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 21:33:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 974 transitions. [2022-03-15 21:33:50,382 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 974 transitions. Word has length 22 [2022-03-15 21:33:50,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:50,382 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 974 transitions. [2022-03-15 21:33:50,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 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 21:33:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 974 transitions. [2022-03-15 21:33:50,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:33:50,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:50,383 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:50,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-15 21:33:50,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:50,599 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:50,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:50,599 INFO L85 PathProgramCache]: Analyzing trace with hash 554128741, now seen corresponding path program 55 times [2022-03-15 21:33:50,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:50,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831443904] [2022-03-15 21:33:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:50,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:50,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:50,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831443904] [2022-03-15 21:33:50,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831443904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:50,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505755174] [2022-03-15 21:33:50,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:33:50,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:50,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:50,761 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:50,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 21:33:50,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:50,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 21:33:50,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:51,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:52,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505755174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:52,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:52,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 41 [2022-03-15 21:33:52,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [912261945] [2022-03-15 21:33:52,893 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:52,894 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:52,897 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2022-03-15 21:33:52,897 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:53,309 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [46122#(< j1 M1), 46126#(and (or (<= counter 3) (not (< (+ 2 j1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 3 counter) (not (< (+ 2 j1) M1)))), 46129#(and (or (not (< (+ 5 j1) M1)) (<= j2 j1)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= counter 0)) (or (not (< (+ 5 j1) M1)) (<= 0 counter))), 46123#(or (< (+ j1 1) M1) (<= M1 j1)), 46124#(and (or (not (< j1 M1)) (<= counter 5)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 5 counter)) (or (not (< j1 M1)) (<= (+ 5 j2) j1))), 46127#(and (or (not (< (+ 3 j1) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= 2 counter)) (or (not (< (+ 3 j1) M1)) (<= counter 2))), 46125#(and (or (<= counter 4) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 4 counter)) (or (<= (+ j2 4) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 46128#(and (or (not (< (+ j1 4) M1)) (<= 1 counter)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= (+ j2 1) j1)) (or (not (< (+ j1 4) M1)) (<= counter 1)))] [2022-03-15 21:33:53,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:33:53,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:53,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:33:53,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=482, Invalid=1968, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:33:53,310 INFO L87 Difference]: Start difference. First operand 387 states and 974 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:54,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:54,785 INFO L93 Difference]: Finished difference Result 664 states and 1466 transitions. [2022-03-15 21:33:54,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:33:54,785 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:33:54,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:54,787 INFO L225 Difference]: With dead ends: 664 [2022-03-15 21:33:54,787 INFO L226 Difference]: Without dead ends: 661 [2022-03-15 21:33:54,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1104, Invalid=4298, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:33:54,788 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 149 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:54,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 0 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:33:54,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-03-15 21:33:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 382. [2022-03-15 21:33:54,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.5354330708661417) internal successors, (966), 381 states have internal predecessors, (966), 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 21:33:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 966 transitions. [2022-03-15 21:33:54,794 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 966 transitions. Word has length 22 [2022-03-15 21:33:54,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:54,794 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 966 transitions. [2022-03-15 21:33:54,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:33:54,794 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 966 transitions. [2022-03-15 21:33:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:33:54,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:54,794 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:54,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 21:33:54,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:54,997 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:54,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:54,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1173186525, now seen corresponding path program 56 times [2022-03-15 21:33:54,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:54,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824159321] [2022-03-15 21:33:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:54,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:33:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:55,173 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:33:55,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824159321] [2022-03-15 21:33:55,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824159321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:33:55,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922244017] [2022-03-15 21:33:55,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:33:55,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:55,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:33:55,174 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:33:55,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-15 21:33:55,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:33:55,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:33:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 21:33:55,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:33:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:55,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:33:56,819 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:33:56,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922244017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:33:56,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:33:56,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 42 [2022-03-15 21:33:56,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1612244784] [2022-03-15 21:33:56,820 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:33:56,831 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:33:56,834 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2022-03-15 21:33:56,834 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:33:57,194 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [47776#(and (or (<= counter 3) (not (< (+ j1 1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= 3 counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 47778#(and (or (not (< (+ 3 j1) M1)) (<= counter 1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= 1 counter))), 47780#(< j1 M1), 47779#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 47775#(and (or (not (< j1 M1)) (<= 4 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter 4) (not (< j1 M1))) (or (not (< j1 M1)) (<= (+ j2 4) j1))), 47777#(and (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 2 counter) (not (< (+ 2 j1) M1))) (or (<= counter 2) (not (< (+ 2 j1) M1)))), 47781#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:33:57,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:33:57,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:33:57,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:33:57,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=2007, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:33:57,195 INFO L87 Difference]: Start difference. First operand 382 states and 966 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 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 21:33:59,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:33:59,581 INFO L93 Difference]: Finished difference Result 1021 states and 2116 transitions. [2022-03-15 21:33:59,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 21:33:59,582 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 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 21:33:59,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:33:59,584 INFO L225 Difference]: With dead ends: 1021 [2022-03-15 21:33:59,584 INFO L226 Difference]: Without dead ends: 1017 [2022-03-15 21:33:59,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1756 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1761, Invalid=7551, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 21:33:59,585 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 218 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:33:59,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 0 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:33:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-03-15 21:33:59,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 377. [2022-03-15 21:33:59,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 2.5398936170212765) internal successors, (955), 376 states have internal predecessors, (955), 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 21:33:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 955 transitions. [2022-03-15 21:33:59,591 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 955 transitions. Word has length 22 [2022-03-15 21:33:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:33:59,591 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 955 transitions. [2022-03-15 21:33:59,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 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 21:33:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 955 transitions. [2022-03-15 21:33:59,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:33:59,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:33:59,592 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:33:59,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-15 21:33:59,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:33:59,793 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:33:59,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:33:59,793 INFO L85 PathProgramCache]: Analyzing trace with hash -278219419, now seen corresponding path program 57 times [2022-03-15 21:33:59,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:33:59,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847395521] [2022-03-15 21:33:59,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:33:59,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:33:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:00,053 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:00,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:00,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847395521] [2022-03-15 21:34:00,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847395521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:00,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337460393] [2022-03-15 21:34:00,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:34:00,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:00,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:00,054 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:00,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-15 21:34:00,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:34:00,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:00,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:34:00,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:00,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:01,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337460393] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:01,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:01,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 43 [2022-03-15 21:34:01,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [549324052] [2022-03-15 21:34:01,375 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:01,376 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:01,379 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 42 transitions. [2022-03-15 21:34:01,379 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:01,756 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [49762#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 49825#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 49821#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter 3)) (or (not (< j1 M1)) (<= 3 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 49824#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ 2 j1) M1))) (or (<= 1 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 49822#(and (or (<= 2 counter) (not (< (+ j1 1) M1))) (or (<= counter 2) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 49826#(< j1 M1), 49823#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:34:01,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:34:01,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:01,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:34:01,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2033, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:34:01,756 INFO L87 Difference]: Start difference. First operand 377 states and 955 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:03,659 INFO L93 Difference]: Finished difference Result 1148 states and 2360 transitions. [2022-03-15 21:34:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:34:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:34:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:03,663 INFO L225 Difference]: With dead ends: 1148 [2022-03-15 21:34:03,663 INFO L226 Difference]: Without dead ends: 1138 [2022-03-15 21:34:03,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1928 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1634, Invalid=7108, Unknown=0, NotChecked=0, Total=8742 [2022-03-15 21:34:03,664 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 173 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:03,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 0 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:03,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-03-15 21:34:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 373. [2022-03-15 21:34:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.5403225806451615) internal successors, (945), 372 states have internal predecessors, (945), 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 21:34:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 945 transitions. [2022-03-15 21:34:03,671 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 945 transitions. Word has length 22 [2022-03-15 21:34:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:03,671 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 945 transitions. [2022-03-15 21:34:03,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 945 transitions. [2022-03-15 21:34:03,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:03,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:03,671 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:03,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-15 21:34:03,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-15 21:34:03,879 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:03,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:03,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1019745827, now seen corresponding path program 58 times [2022-03-15 21:34:03,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:03,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771017928] [2022-03-15 21:34:03,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:03,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:04,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:04,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771017928] [2022-03-15 21:34:04,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771017928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:04,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632041949] [2022-03-15 21:34:04,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:34:04,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:04,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:04,070 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:04,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-15 21:34:04,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:34:04,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:04,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:34:04,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:04,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:05,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632041949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:05,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:05,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2022-03-15 21:34:05,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [888157845] [2022-03-15 21:34:05,301 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:05,302 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:05,305 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 44 transitions. [2022-03-15 21:34:05,305 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:05,702 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [51984#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 51987#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 51986#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 51985#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 51982#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 51988#(< j1 M1), 51983#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:34:05,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:34:05,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:05,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:34:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=2407, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:34:05,703 INFO L87 Difference]: Start difference. First operand 373 states and 945 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 21:34:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:07,062 INFO L93 Difference]: Finished difference Result 1227 states and 2509 transitions. [2022-03-15 21:34:07,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:34:07,062 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 21:34:07,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:07,065 INFO L225 Difference]: With dead ends: 1227 [2022-03-15 21:34:07,065 INFO L226 Difference]: Without dead ends: 1207 [2022-03-15 21:34:07,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1315, Invalid=6167, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:34:07,074 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 159 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:07,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 0 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:07,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-03-15 21:34:07,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 373. [2022-03-15 21:34:07,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.5403225806451615) internal successors, (945), 372 states have internal predecessors, (945), 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 21:34:07,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 945 transitions. [2022-03-15 21:34:07,082 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 945 transitions. Word has length 22 [2022-03-15 21:34:07,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:07,082 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 945 transitions. [2022-03-15 21:34:07,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 21:34:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 945 transitions. [2022-03-15 21:34:07,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:07,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:07,083 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:07,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-15 21:34:07,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-15 21:34:07,283 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:07,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:07,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1370344685, now seen corresponding path program 59 times [2022-03-15 21:34:07,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:07,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510334029] [2022-03-15 21:34:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:07,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:07,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:07,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:07,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510334029] [2022-03-15 21:34:07,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510334029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:07,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560081103] [2022-03-15 21:34:07,450 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:34:07,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:07,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:07,451 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:07,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-15 21:34:07,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:34:07,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:07,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:34:07,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:07,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:08,413 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:08,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560081103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:08,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:08,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 44 [2022-03-15 21:34:08,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1500961388] [2022-03-15 21:34:08,414 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:08,415 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:08,418 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 42 transitions. [2022-03-15 21:34:08,418 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:08,742 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [54201#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 54200#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 54202#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 54199#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 54204#(< j1 M1), 54203#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:34:08,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:34:08,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:08,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:34:08,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2176, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:34:08,752 INFO L87 Difference]: Start difference. First operand 373 states and 945 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 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 21:34:09,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:09,646 INFO L93 Difference]: Finished difference Result 960 states and 2081 transitions. [2022-03-15 21:34:09,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:34:09,646 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 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 21:34:09,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:09,648 INFO L225 Difference]: With dead ends: 960 [2022-03-15 21:34:09,648 INFO L226 Difference]: Without dead ends: 946 [2022-03-15 21:34:09,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=894, Invalid=4508, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:34:09,648 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 142 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:09,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 0 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-03-15 21:34:09,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 416. [2022-03-15 21:34:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.5421686746987953) internal successors, (1055), 415 states have internal predecessors, (1055), 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 21:34:09,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1055 transitions. [2022-03-15 21:34:09,654 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1055 transitions. Word has length 22 [2022-03-15 21:34:09,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:09,654 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1055 transitions. [2022-03-15 21:34:09,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 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 21:34:09,655 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1055 transitions. [2022-03-15 21:34:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:09,655 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:09,655 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:09,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-15 21:34:09,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:09,856 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:09,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:09,856 INFO L85 PathProgramCache]: Analyzing trace with hash -775826075, now seen corresponding path program 60 times [2022-03-15 21:34:09,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:09,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348879848] [2022-03-15 21:34:09,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:09,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:10,037 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:10,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348879848] [2022-03-15 21:34:10,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348879848] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:10,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767272981] [2022-03-15 21:34:10,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:34:10,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:10,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:10,038 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:10,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-15 21:34:10,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:34:10,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:10,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:34:10,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:10,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:11,001 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:11,001 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767272981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:11,001 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:11,001 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-03-15 21:34:11,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [747522200] [2022-03-15 21:34:11,002 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:11,003 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:11,005 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 46 transitions. [2022-03-15 21:34:11,005 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:11,397 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [56218#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 56219#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 56216#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 56156#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 56220#(< j1 M1), 56217#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 56215#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1)))] [2022-03-15 21:34:11,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:34:11,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:11,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:34:11,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2250, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:34:11,397 INFO L87 Difference]: Start difference. First operand 416 states and 1055 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:12,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:12,671 INFO L93 Difference]: Finished difference Result 956 states and 1999 transitions. [2022-03-15 21:34:12,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:34:12,672 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:34:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:12,673 INFO L225 Difference]: With dead ends: 956 [2022-03-15 21:34:12,673 INFO L226 Difference]: Without dead ends: 932 [2022-03-15 21:34:12,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1356, Invalid=6476, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 21:34:12,674 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 162 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:12,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 0 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-03-15 21:34:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 376. [2022-03-15 21:34:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.536) internal successors, (951), 375 states have internal predecessors, (951), 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 21:34:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 951 transitions. [2022-03-15 21:34:12,680 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 951 transitions. Word has length 22 [2022-03-15 21:34:12,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:12,680 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 951 transitions. [2022-03-15 21:34:12,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:12,680 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 951 transitions. [2022-03-15 21:34:12,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:12,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:12,681 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:12,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:12,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:12,881 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:12,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:12,881 INFO L85 PathProgramCache]: Analyzing trace with hash -550005675, now seen corresponding path program 61 times [2022-03-15 21:34:12,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:12,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070554276] [2022-03-15 21:34:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:12,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:13,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:13,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070554276] [2022-03-15 21:34:13,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070554276] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:13,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512729102] [2022-03-15 21:34:13,030 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:34:13,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:13,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:13,031 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:13,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-15 21:34:13,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:13,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 21:34:13,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:13,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:14,052 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:14,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512729102] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:14,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:14,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 45 [2022-03-15 21:34:14,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1463117942] [2022-03-15 21:34:14,052 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:14,053 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:14,056 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2022-03-15 21:34:14,056 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:14,237 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [58178#(< j1 M1), 58177#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 58175#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 58176#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:34:14,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:34:14,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:14,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:34:14,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=2054, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:34:14,238 INFO L87 Difference]: Start difference. First operand 376 states and 951 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 21:34:15,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:15,298 INFO L93 Difference]: Finished difference Result 979 states and 2146 transitions. [2022-03-15 21:34:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:34:15,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 22 [2022-03-15 21:34:15,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:15,307 INFO L225 Difference]: With dead ends: 979 [2022-03-15 21:34:15,307 INFO L226 Difference]: Without dead ends: 973 [2022-03-15 21:34:15,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1341, Invalid=5631, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 21:34:15,308 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 146 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:15,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 0 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-03-15 21:34:15,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 482. [2022-03-15 21:34:15,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 2.6133056133056134) internal successors, (1257), 481 states have internal predecessors, (1257), 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 21:34:15,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 1257 transitions. [2022-03-15 21:34:15,315 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 1257 transitions. Word has length 22 [2022-03-15 21:34:15,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:15,315 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 1257 transitions. [2022-03-15 21:34:15,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 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 21:34:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 1257 transitions. [2022-03-15 21:34:15,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:15,316 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:15,316 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:15,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-15 21:34:15,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:15,531 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:15,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1866162979, now seen corresponding path program 62 times [2022-03-15 21:34:15,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:15,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712172572] [2022-03-15 21:34:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:15,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:15,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:15,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712172572] [2022-03-15 21:34:15,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712172572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:15,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572569319] [2022-03-15 21:34:15,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:34:15,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:15,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:15,671 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:15,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-15 21:34:15,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:34:15,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:15,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:34:15,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:16,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:16,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572569319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:16,593 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:16,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 44 [2022-03-15 21:34:16,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1035056693] [2022-03-15 21:34:16,593 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:16,594 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:16,597 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 40 transitions. [2022-03-15 21:34:16,597 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:16,857 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [60363#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 60302#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 60362#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 60364#(< j1 M1), 60361#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:34:16,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:34:16,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:16,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:34:16,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:34:16,858 INFO L87 Difference]: Start difference. First operand 482 states and 1257 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:17,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:17,923 INFO L93 Difference]: Finished difference Result 890 states and 1973 transitions. [2022-03-15 21:34:17,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:34:17,924 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:34:17,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:17,925 INFO L225 Difference]: With dead ends: 890 [2022-03-15 21:34:17,925 INFO L226 Difference]: Without dead ends: 882 [2022-03-15 21:34:17,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1232, Invalid=5574, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:34:17,926 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 181 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:17,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 0 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-03-15 21:34:17,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 474. [2022-03-15 21:34:17,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.5961945031712474) internal successors, (1228), 473 states have internal predecessors, (1228), 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 21:34:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1228 transitions. [2022-03-15 21:34:17,932 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1228 transitions. Word has length 22 [2022-03-15 21:34:17,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:17,933 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1228 transitions. [2022-03-15 21:34:17,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:17,933 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1228 transitions. [2022-03-15 21:34:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:17,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:17,933 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:17,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-15 21:34:18,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:18,139 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:18,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:18,139 INFO L85 PathProgramCache]: Analyzing trace with hash 282633557, now seen corresponding path program 63 times [2022-03-15 21:34:18,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:18,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78892199] [2022-03-15 21:34:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:18,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:18,298 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 14 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:18,299 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:18,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78892199] [2022-03-15 21:34:18,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78892199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:18,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871590230] [2022-03-15 21:34:18,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:34:18,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:18,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:18,301 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:18,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-15 21:34:18,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:34:18,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:18,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:34:18,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:18,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:19,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871590230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:19,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:19,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-03-15 21:34:19,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1889708389] [2022-03-15 21:34:19,242 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:19,244 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:19,246 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 44 transitions. [2022-03-15 21:34:19,246 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:19,587 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [62445#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 62447#(< j1 M1), 62443#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 62384#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 62444#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 62446#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:34:19,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:34:19,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:34:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2166, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:34:19,588 INFO L87 Difference]: Start difference. First operand 474 states and 1228 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:20,430 INFO L93 Difference]: Finished difference Result 697 states and 1584 transitions. [2022-03-15 21:34:20,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:34:20,430 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:34:20,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:20,431 INFO L225 Difference]: With dead ends: 697 [2022-03-15 21:34:20,431 INFO L226 Difference]: Without dead ends: 687 [2022-03-15 21:34:20,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=896, Invalid=4506, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:34:20,432 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 154 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:20,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 0 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:20,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-03-15 21:34:20,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 418. [2022-03-15 21:34:20,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.5323741007194243) internal successors, (1056), 417 states have internal predecessors, (1056), 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 21:34:20,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1056 transitions. [2022-03-15 21:34:20,437 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1056 transitions. Word has length 22 [2022-03-15 21:34:20,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:20,438 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1056 transitions. [2022-03-15 21:34:20,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:20,438 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1056 transitions. [2022-03-15 21:34:20,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:20,438 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:20,438 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:20,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:20,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-15 21:34:20,639 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:20,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:20,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1824150563, now seen corresponding path program 64 times [2022-03-15 21:34:20,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:20,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970593329] [2022-03-15 21:34:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:20,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:20,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:20,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970593329] [2022-03-15 21:34:20,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970593329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:20,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797016813] [2022-03-15 21:34:20,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:34:20,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:20,826 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:20,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-15 21:34:20,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:34:20,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:20,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:34:20,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:21,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:21,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:21,841 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797016813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:21,841 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:21,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 48 [2022-03-15 21:34:21,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1460366111] [2022-03-15 21:34:21,841 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:21,843 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:21,845 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 48 transitions. [2022-03-15 21:34:21,846 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:22,268 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [64205#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 64202#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 64206#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 64204#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 64208#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 64207#(< j1 M1), 64203#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:34:22,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:34:22,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:22,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:34:22,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=2604, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:34:22,269 INFO L87 Difference]: Start difference. First operand 418 states and 1056 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 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 21:34:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:23,328 INFO L93 Difference]: Finished difference Result 663 states and 1481 transitions. [2022-03-15 21:34:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:34:23,328 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 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 21:34:23,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:23,329 INFO L225 Difference]: With dead ends: 663 [2022-03-15 21:34:23,329 INFO L226 Difference]: Without dead ends: 651 [2022-03-15 21:34:23,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1315, Invalid=6167, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:34:23,330 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 158 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:23,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 0 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:23,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2022-03-15 21:34:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 378. [2022-03-15 21:34:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 2.53315649867374) internal successors, (955), 377 states have internal predecessors, (955), 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 21:34:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 955 transitions. [2022-03-15 21:34:23,335 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 955 transitions. Word has length 22 [2022-03-15 21:34:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:23,335 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 955 transitions. [2022-03-15 21:34:23,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 24 states have internal predecessors, (42), 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 21:34:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 955 transitions. [2022-03-15 21:34:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:23,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:23,335 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:23,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:23,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:23,536 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1125059821, now seen corresponding path program 65 times [2022-03-15 21:34:23,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:23,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489357221] [2022-03-15 21:34:23,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:23,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:23,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:23,666 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:23,666 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:23,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489357221] [2022-03-15 21:34:23,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489357221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:23,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406757038] [2022-03-15 21:34:23,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:34:23,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:23,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:23,667 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:23,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-15 21:34:23,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:34:23,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:23,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:34:23,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:24,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:24,537 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:24,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406757038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:24,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:24,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 41 [2022-03-15 21:34:24,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2083168535] [2022-03-15 21:34:24,537 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:24,538 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:24,541 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2022-03-15 21:34:24,541 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:24,611 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [65859#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 65858#(< j1 M1)] [2022-03-15 21:34:24,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:34:24,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:24,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:34:24,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1549, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:34:24,612 INFO L87 Difference]: Start difference. First operand 378 states and 955 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 21:34:24,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:24,967 INFO L93 Difference]: Finished difference Result 852 states and 1877 transitions. [2022-03-15 21:34:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:34:24,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 22 [2022-03-15 21:34:24,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:24,969 INFO L225 Difference]: With dead ends: 852 [2022-03-15 21:34:24,969 INFO L226 Difference]: Without dead ends: 848 [2022-03-15 21:34:24,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1072 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=675, Invalid=2865, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:34:24,969 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 105 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:24,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 0 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-03-15 21:34:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 481. [2022-03-15 21:34:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.6041666666666665) internal successors, (1250), 480 states have internal predecessors, (1250), 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 21:34:24,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1250 transitions. [2022-03-15 21:34:24,976 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1250 transitions. Word has length 22 [2022-03-15 21:34:24,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:24,976 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1250 transitions. [2022-03-15 21:34:24,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 21:34:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1250 transitions. [2022-03-15 21:34:24,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:24,977 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:24,977 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:24,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-15 21:34:25,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-15 21:34:25,178 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:25,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:25,178 INFO L85 PathProgramCache]: Analyzing trace with hash 251319141, now seen corresponding path program 66 times [2022-03-15 21:34:25,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:25,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502263529] [2022-03-15 21:34:25,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:25,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:25,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:25,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502263529] [2022-03-15 21:34:25,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502263529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:25,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410857427] [2022-03-15 21:34:25,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:34:25,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:25,292 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:25,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-15 21:34:25,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:34:25,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:25,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:34:25,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:25,635 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:25,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:26,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410857427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:26,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:26,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 42 [2022-03-15 21:34:26,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [706845488] [2022-03-15 21:34:26,088 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:26,089 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:26,091 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 34 transitions. [2022-03-15 21:34:26,091 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:26,221 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [67876#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 67877#(< j1 M1), 67875#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:34:26,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:34:26,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:34:26,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1734, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:34:26,222 INFO L87 Difference]: Start difference. First operand 481 states and 1250 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 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 21:34:26,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:26,644 INFO L93 Difference]: Finished difference Result 881 states and 1943 transitions. [2022-03-15 21:34:26,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:34:26,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 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 21:34:26,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:26,646 INFO L225 Difference]: With dead ends: 881 [2022-03-15 21:34:26,646 INFO L226 Difference]: Without dead ends: 875 [2022-03-15 21:34:26,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=757, Invalid=3533, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:34:26,646 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 141 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:26,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 0 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-03-15 21:34:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 484. [2022-03-15 21:34:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.598343685300207) internal successors, (1255), 483 states have internal predecessors, (1255), 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 21:34:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1255 transitions. [2022-03-15 21:34:26,657 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1255 transitions. Word has length 22 [2022-03-15 21:34:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:26,657 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1255 transitions. [2022-03-15 21:34:26,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 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 21:34:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1255 transitions. [2022-03-15 21:34:26,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:26,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:26,658 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:26,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-15 21:34:26,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-15 21:34:26,858 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:26,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:26,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1064838163, now seen corresponding path program 67 times [2022-03-15 21:34:26,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:26,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215335850] [2022-03-15 21:34:26,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:26,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:26,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:26,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215335850] [2022-03-15 21:34:26,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215335850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:26,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697208865] [2022-03-15 21:34:26,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:34:26,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:26,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:26,981 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:26,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-15 21:34:27,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:27,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:34:27,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:27,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:27,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697208865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:27,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:27,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 43 [2022-03-15 21:34:27,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1258188371] [2022-03-15 21:34:27,782 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:27,783 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:27,786 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 38 transitions. [2022-03-15 21:34:27,786 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:27,991 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [69940#(< j1 M1), 69938#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 69937#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 69939#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:34:27,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:34:27,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:27,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:34:27,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1913, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:34:27,991 INFO L87 Difference]: Start difference. First operand 484 states and 1255 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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 21:34:28,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:28,470 INFO L93 Difference]: Finished difference Result 841 states and 1867 transitions. [2022-03-15 21:34:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:34:28,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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 22 [2022-03-15 21:34:28,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:28,472 INFO L225 Difference]: With dead ends: 841 [2022-03-15 21:34:28,472 INFO L226 Difference]: Without dead ends: 833 [2022-03-15 21:34:28,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=770, Invalid=3786, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:34:28,472 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 148 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:28,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 0 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-03-15 21:34:28,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 481. [2022-03-15 21:34:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 2.5875) internal successors, (1242), 480 states have internal predecessors, (1242), 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 21:34:28,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1242 transitions. [2022-03-15 21:34:28,479 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1242 transitions. Word has length 22 [2022-03-15 21:34:28,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:28,479 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1242 transitions. [2022-03-15 21:34:28,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 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 21:34:28,479 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1242 transitions. [2022-03-15 21:34:28,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:28,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:28,480 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:28,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-15 21:34:28,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-15 21:34:28,680 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:28,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:28,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1083958373, now seen corresponding path program 68 times [2022-03-15 21:34:28,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:28,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485992824] [2022-03-15 21:34:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:28,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:28,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:28,813 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 19 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:28,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:28,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485992824] [2022-03-15 21:34:28,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485992824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:28,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678815296] [2022-03-15 21:34:28,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:34:28,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:28,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:28,814 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:28,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-15 21:34:28,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:34:28,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:28,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:34:28,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:29,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:29,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678815296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:29,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:29,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 44 [2022-03-15 21:34:29,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [866746778] [2022-03-15 21:34:29,630 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:29,632 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:29,635 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 42 transitions. [2022-03-15 21:34:29,635 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:29,924 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [71956#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 71955#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 71896#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 71958#(< j1 M1), 71957#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:34:29,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:34:29,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:29,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:34:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=2010, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:34:29,924 INFO L87 Difference]: Start difference. First operand 481 states and 1242 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 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 21:34:30,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:30,411 INFO L93 Difference]: Finished difference Result 753 states and 1695 transitions. [2022-03-15 21:34:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:34:30,412 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 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 21:34:30,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:30,413 INFO L225 Difference]: With dead ends: 753 [2022-03-15 21:34:30,413 INFO L226 Difference]: Without dead ends: 743 [2022-03-15 21:34:30,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=711, Invalid=3711, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:34:30,414 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 159 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:30,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 0 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:30,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-03-15 21:34:30,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 472. [2022-03-15 21:34:30,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.5711252653927814) internal successors, (1211), 471 states have internal predecessors, (1211), 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 21:34:30,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 1211 transitions. [2022-03-15 21:34:30,420 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 1211 transitions. Word has length 22 [2022-03-15 21:34:30,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:30,420 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 1211 transitions. [2022-03-15 21:34:30,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 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 21:34:30,420 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 1211 transitions. [2022-03-15 21:34:30,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:30,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:30,421 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:30,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:30,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-15 21:34:30,621 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:30,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:30,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1022825747, now seen corresponding path program 69 times [2022-03-15 21:34:30,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:30,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721529253] [2022-03-15 21:34:30,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:30,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:30,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:30,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721529253] [2022-03-15 21:34:30,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721529253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:30,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219599416] [2022-03-15 21:34:30,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:34:30,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:30,764 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:30,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-15 21:34:30,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:34:30,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:30,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-15 21:34:30,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:31,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 15 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:31,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219599416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:31,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:31,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 47 [2022-03-15 21:34:31,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [234518460] [2022-03-15 21:34:31,672 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:31,674 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:31,677 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 46 transitions. [2022-03-15 21:34:31,677 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:32,059 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [73869#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 73871#(< j1 M1), 73870#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 73867#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 73866#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 73868#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:34:32,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:34:32,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:32,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:34:32,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2453, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:34:32,060 INFO L87 Difference]: Start difference. First operand 472 states and 1211 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 21:34:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:32,552 INFO L93 Difference]: Finished difference Result 614 states and 1407 transitions. [2022-03-15 21:34:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:34:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 21:34:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:32,553 INFO L225 Difference]: With dead ends: 614 [2022-03-15 21:34:32,553 INFO L226 Difference]: Without dead ends: 602 [2022-03-15 21:34:32,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1458 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=700, Invalid=3856, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:34:32,554 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:32,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 0 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-03-15 21:34:32,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 421. [2022-03-15 21:34:32,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.5166666666666666) internal successors, (1057), 420 states have internal predecessors, (1057), 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 21:34:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1057 transitions. [2022-03-15 21:34:32,559 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1057 transitions. Word has length 22 [2022-03-15 21:34:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:32,559 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1057 transitions. [2022-03-15 21:34:32,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 21:34:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1057 transitions. [2022-03-15 21:34:32,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:34:32,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:32,560 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:32,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-15 21:34:32,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:32,760 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:32,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:32,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1908624027, now seen corresponding path program 70 times [2022-03-15 21:34:32,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:32,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489589117] [2022-03-15 21:34:32,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:32,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:32,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:32,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489589117] [2022-03-15 21:34:32,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489589117] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:32,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529487149] [2022-03-15 21:34:32,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:34:32,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:32,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:32,929 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:32,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-15 21:34:32,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:34:32,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:32,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:34:32,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:33,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:33,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529487149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:33,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:33,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2022-03-15 21:34:33,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1345519439] [2022-03-15 21:34:33,742 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:33,743 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:33,746 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 50 transitions. [2022-03-15 21:34:33,746 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:34,186 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [75533#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 75530#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 75534#(< j1 M1), 75531#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 75532#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 75535#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 75529#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:34:34,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:34:34,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:34,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:34:34,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=2411, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:34:34,187 INFO L87 Difference]: Start difference. First operand 421 states and 1057 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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 21:34:34,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:34,861 INFO L93 Difference]: Finished difference Result 599 states and 1330 transitions. [2022-03-15 21:34:34,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:34:34,862 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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 21:34:34,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:34,863 INFO L225 Difference]: With dead ends: 599 [2022-03-15 21:34:34,863 INFO L226 Difference]: Without dead ends: 573 [2022-03-15 21:34:34,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=979, Invalid=4721, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:34:34,864 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 154 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:34,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 0 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-03-15 21:34:34,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 435. [2022-03-15 21:34:34,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.5161290322580645) internal successors, (1092), 434 states have internal predecessors, (1092), 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 21:34:34,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1092 transitions. [2022-03-15 21:34:34,869 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1092 transitions. Word has length 22 [2022-03-15 21:34:34,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:34,869 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1092 transitions. [2022-03-15 21:34:34,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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 21:34:34,869 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1092 transitions. [2022-03-15 21:34:34,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:34,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:34,870 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:34,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:35,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:35,086 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:35,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:35,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1807407330, now seen corresponding path program 71 times [2022-03-15 21:34:35,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:35,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802903924] [2022-03-15 21:34:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:35,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:35,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:35,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802903924] [2022-03-15 21:34:35,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802903924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:35,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481987500] [2022-03-15 21:34:35,237 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:34:35,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:35,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:35,238 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:35,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-15 21:34:35,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:34:35,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:35,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 21:34:35,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:35,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:36,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481987500] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:36,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:36,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 49 [2022-03-15 21:34:36,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [395332631] [2022-03-15 21:34:36,086 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:36,087 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:36,091 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 73 transitions. [2022-03-15 21:34:36,091 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:36,710 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 17 new interpolants: [77231#(< j1 M1), 77243#(or (<= M1 (+ 3 j1)) (<= (+ j2 8) M2) (< (+ j1 4) M1)), 77241#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ j2 8) M2)), 77245#(or (<= (+ j2 8) M2) (<= M1 (+ 5 j1)) (< (+ 6 j1) M1)), 77235#(or (< j1 M1) (<= (+ j2 4) M2)), 77244#(or (<= (+ j2 8) M2) (< (+ 5 j1) M1) (<= M1 (+ j1 4))), 77236#(or (< j1 M1) (<= (+ 5 j2) M2)), 77234#(or (< j1 M1) (<= (+ 3 j2) M2)), 77233#(or (< j1 M1) (<= (+ 2 j2) M2)), 77242#(or (<= M1 (+ 2 j1)) (<= (+ j2 8) M2) (< (+ 3 j1) M1)), 77246#(or (<= (+ j2 8) M2) (< (+ 7 j1) M1) (<= M1 (+ 6 j1))), 77239#(or (< j1 M1) (<= (+ j2 8) M2)), 77237#(or (<= (+ 6 j2) M2) (< j1 M1)), 77232#(or (< j1 M1) (<= (+ j2 1) M2)), 77238#(or (<= (+ 7 j2) M2) (< j1 M1)), 77247#(or (<= (+ j2 8) M2) (< (+ j1 8) M1) (<= M1 (+ 7 j1))), 77240#(or (<= (+ j2 8) M2) (< (+ j1 1) M1) (<= M1 j1))] [2022-03-15 21:34:36,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:34:36,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:36,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:34:36,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=799, Invalid=3623, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:34:36,711 INFO L87 Difference]: Start difference. First operand 435 states and 1092 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 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 21:34:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:37,527 INFO L93 Difference]: Finished difference Result 666 states and 1480 transitions. [2022-03-15 21:34:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:34:37,527 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 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 23 [2022-03-15 21:34:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:37,528 INFO L225 Difference]: With dead ends: 666 [2022-03-15 21:34:37,529 INFO L226 Difference]: Without dead ends: 618 [2022-03-15 21:34:37,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2036, Invalid=7276, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 21:34:37,529 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 162 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:37,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 0 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:37,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-03-15 21:34:37,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 433. [2022-03-15 21:34:37,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.5046296296296298) internal successors, (1082), 432 states have internal predecessors, (1082), 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 21:34:37,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1082 transitions. [2022-03-15 21:34:37,536 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1082 transitions. Word has length 23 [2022-03-15 21:34:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:37,536 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1082 transitions. [2022-03-15 21:34:37,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 35 states have internal predecessors, (65), 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 21:34:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1082 transitions. [2022-03-15 21:34:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:34:37,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:37,537 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:37,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:37,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:37,750 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:37,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:37,751 INFO L85 PathProgramCache]: Analyzing trace with hash 2004483674, now seen corresponding path program 72 times [2022-03-15 21:34:37,751 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:37,751 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147012252] [2022-03-15 21:34:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:37,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:37,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:37,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:37,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147012252] [2022-03-15 21:34:37,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147012252] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:37,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455264807] [2022-03-15 21:34:37,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:34:37,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:37,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:37,902 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:37,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-15 21:34:37,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:34:37,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:37,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:34:37,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:38,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:38,790 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:38,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455264807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:38,790 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:38,790 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 41 [2022-03-15 21:34:38,790 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1815581305] [2022-03-15 21:34:38,790 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:38,791 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:38,794 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 43 transitions. [2022-03-15 21:34:38,794 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:39,054 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [79014#(< j2 M2), 79021#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 6 j1))) (or (<= j2 j1) (<= M1 (+ 6 j1)))), 79015#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= (+ 6 j2) j1) (<= M1 j1))), 79016#(and (or (<= M1 (+ j1 1)) (<= (+ 5 j2) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 79019#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 4))) (or (<= (+ 2 j2) j1) (<= M1 (+ j1 4)))), 79020#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 5 j1))) (or (<= M1 (+ 5 j1)) (<= (+ j2 1) j1))), 79018#(and (or (<= M1 (+ 3 j1)) (<= (+ 3 j2) j1)) (or (<= M1 (+ 3 j1)) (= (+ (* (- 1) M1) M2) 0))), 79017#(and (or (<= M1 (+ 2 j1)) (<= (+ j2 4) j1)) (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 21:34:39,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:34:39,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:39,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:34:39,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=1885, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:34:39,055 INFO L87 Difference]: Start difference. First operand 433 states and 1082 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:39,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:39,419 INFO L93 Difference]: Finished difference Result 508 states and 1211 transitions. [2022-03-15 21:34:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:34:39,419 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 21:34:39,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:39,420 INFO L225 Difference]: With dead ends: 508 [2022-03-15 21:34:39,420 INFO L226 Difference]: Without dead ends: 507 [2022-03-15 21:34:39,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1290, Invalid=3822, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:34:39,421 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:39,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 0 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:39,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-03-15 21:34:39,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 433. [2022-03-15 21:34:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.502314814814815) internal successors, (1081), 432 states have internal predecessors, (1081), 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 21:34:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1081 transitions. [2022-03-15 21:34:39,426 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1081 transitions. Word has length 23 [2022-03-15 21:34:39,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:39,426 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1081 transitions. [2022-03-15 21:34:39,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:39,426 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1081 transitions. [2022-03-15 21:34:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:34:39,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:39,427 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:39,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:39,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-15 21:34:39,643 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:39,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash 194909979, now seen corresponding path program 73 times [2022-03-15 21:34:39,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:39,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583945823] [2022-03-15 21:34:39,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:39,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:39,763 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:39,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583945823] [2022-03-15 21:34:39,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583945823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:39,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063832197] [2022-03-15 21:34:39,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:34:39,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:39,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:39,764 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:39,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-15 21:34:39,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:39,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:34:39,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:39,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:40,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063832197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:40,356 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:40,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 17] total 25 [2022-03-15 21:34:40,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2021405811] [2022-03-15 21:34:40,357 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:40,358 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:40,363 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 78 transitions. [2022-03-15 21:34:40,363 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:40,755 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:34:40,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:34:40,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:40,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:34:40,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:34:40,756 INFO L87 Difference]: Start difference. First operand 433 states and 1081 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 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 21:34:40,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:40,954 INFO L93 Difference]: Finished difference Result 662 states and 1556 transitions. [2022-03-15 21:34:40,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:34:40,955 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:34:40,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:40,956 INFO L225 Difference]: With dead ends: 662 [2022-03-15 21:34:40,956 INFO L226 Difference]: Without dead ends: 640 [2022-03-15 21:34:40,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:34:40,956 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 31 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:40,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 0 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:34:40,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-03-15 21:34:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 522. [2022-03-15 21:34:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 2.543186180422265) internal successors, (1325), 521 states have internal predecessors, (1325), 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 21:34:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1325 transitions. [2022-03-15 21:34:40,962 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1325 transitions. Word has length 24 [2022-03-15 21:34:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:40,962 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1325 transitions. [2022-03-15 21:34:40,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 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 21:34:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1325 transitions. [2022-03-15 21:34:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:34:40,963 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:40,963 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:40,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:41,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:41,164 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:41,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:41,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1866907193, now seen corresponding path program 74 times [2022-03-15 21:34:41,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:41,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914775424] [2022-03-15 21:34:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:41,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:41,392 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:41,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914775424] [2022-03-15 21:34:41,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914775424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:41,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934776567] [2022-03-15 21:34:41,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:34:41,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:41,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:41,394 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:41,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-15 21:34:41,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:34:41,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:41,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:34:41,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:41,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:44,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934776567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:44,064 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:44,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 46 [2022-03-15 21:34:44,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1304457943] [2022-03-15 21:34:44,064 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:44,065 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:44,068 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 21:34:44,068 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:44,554 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [82502#(and (or (<= j2 j1) (not (< (+ 6 j1) M1))) (or (<= counter 0) (not (< (+ 6 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= 0 counter) (not (< (+ 6 j1) M1)))), 82497#(and (or (<= counter 5) (not (< (+ j1 1) M1))) (or (<= (+ 5 j2) j1) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 5 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 82499#(and (or (not (< (+ 3 j1) M1)) (<= (+ 3 j2) j1)) (or (not (< (+ 3 j1) M1)) (<= 3 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= counter 3))), 82498#(and (or (<= (+ j2 4) j1) (not (< (+ 2 j1) M1))) (or (<= counter 4) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 4 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 82504#(or (< (+ j1 1) M1) (<= M1 j1)), 82496#(and (or (not (< j1 M1)) (<= (+ 6 j2) j1)) (or (<= 6 counter) (not (< j1 M1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 6))), 82503#(< j1 M1), 82501#(and (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 5 j1) M1)) (<= 1 counter)) (or (not (< (+ 5 j1) M1)) (<= counter 1))), 82500#(and (or (not (< (+ j1 4) M1)) (<= counter 2)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ j1 4) M1)) (<= 2 counter)))] [2022-03-15 21:34:44,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:34:44,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:44,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:34:44,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=2476, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:34:44,555 INFO L87 Difference]: Start difference. First operand 522 states and 1325 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 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 21:34:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:46,354 INFO L93 Difference]: Finished difference Result 890 states and 1988 transitions. [2022-03-15 21:34:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:34:46,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:34:46,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:46,356 INFO L225 Difference]: With dead ends: 890 [2022-03-15 21:34:46,356 INFO L226 Difference]: Without dead ends: 887 [2022-03-15 21:34:46,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1377, Invalid=5429, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:34:46,356 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 171 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:46,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 0 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:34:46,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-03-15 21:34:46,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 516. [2022-03-15 21:34:46,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 2.5533980582524274) internal successors, (1315), 515 states have internal predecessors, (1315), 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 21:34:46,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1315 transitions. [2022-03-15 21:34:46,363 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1315 transitions. Word has length 24 [2022-03-15 21:34:46,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:46,363 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1315 transitions. [2022-03-15 21:34:46,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 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 21:34:46,363 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1315 transitions. [2022-03-15 21:34:46,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:34:46,364 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:46,364 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:46,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:46,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:46,575 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:46,575 INFO L85 PathProgramCache]: Analyzing trace with hash 913290825, now seen corresponding path program 75 times [2022-03-15 21:34:46,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:46,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636316648] [2022-03-15 21:34:46,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:46,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:46,757 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:46,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:46,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636316648] [2022-03-15 21:34:46,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636316648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:46,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481490401] [2022-03-15 21:34:46,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:34:46,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:46,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:46,759 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:46,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-15 21:34:46,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:34:46,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:46,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:34:46,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:47,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:48,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481490401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:48,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:48,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 47 [2022-03-15 21:34:48,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1682429326] [2022-03-15 21:34:48,991 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:48,992 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:48,995 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 21:34:48,995 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:49,450 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [84673#(and (or (not (< (+ 5 j1) M1)) (<= j2 j1)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= counter 0)) (or (not (< (+ 5 j1) M1)) (<= 0 counter))), 84670#(and (or (not (< (+ 3 j1) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= 2 counter)) (or (not (< (+ 3 j1) M1)) (<= counter 2))), 84671#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 84667#(and (or (not (< j1 M1)) (<= counter 5)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 5 counter)) (or (not (< j1 M1)) (<= (+ 5 j2) j1))), 84672#(and (or (not (< (+ j1 4) M1)) (<= 1 counter)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= (+ j2 1) j1)) (or (not (< (+ j1 4) M1)) (<= counter 1))), 84669#(and (or (<= counter 3) (not (< (+ 2 j1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 3 counter) (not (< (+ 2 j1) M1)))), 84668#(and (or (<= counter 4) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 4 counter)) (or (<= (+ j2 4) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 84674#(< j1 M1)] [2022-03-15 21:34:49,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:34:49,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:34:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=557, Invalid=2523, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:34:49,451 INFO L87 Difference]: Start difference. First operand 516 states and 1315 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 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 21:34:52,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:52,689 INFO L93 Difference]: Finished difference Result 1375 states and 2865 transitions. [2022-03-15 21:34:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 21:34:52,690 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:34:52,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:52,692 INFO L225 Difference]: With dead ends: 1375 [2022-03-15 21:34:52,692 INFO L226 Difference]: Without dead ends: 1371 [2022-03-15 21:34:52,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2386 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2313, Invalid=10119, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 21:34:52,693 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 273 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:52,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 0 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:34:52,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-03-15 21:34:52,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 510. [2022-03-15 21:34:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 509 states have (on average 2.5579567779960706) internal successors, (1302), 509 states have internal predecessors, (1302), 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 21:34:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 1302 transitions. [2022-03-15 21:34:52,701 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 1302 transitions. Word has length 24 [2022-03-15 21:34:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:52,701 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 1302 transitions. [2022-03-15 21:34:52,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 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 21:34:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 1302 transitions. [2022-03-15 21:34:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:34:52,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:52,702 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:52,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-15 21:34:52,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-15 21:34:52,915 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:52,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:52,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2046373575, now seen corresponding path program 76 times [2022-03-15 21:34:52,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:52,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008517588] [2022-03-15 21:34:52,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:52,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:53,098 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:53,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:53,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008517588] [2022-03-15 21:34:53,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008517588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:53,099 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068845809] [2022-03-15 21:34:53,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:34:53,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:53,100 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:53,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-15 21:34:53,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:34:53,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:53,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:34:53,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:53,574 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:53,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:54,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068845809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:54,982 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:54,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 50 [2022-03-15 21:34:54,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [245581647] [2022-03-15 21:34:54,982 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:54,983 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:54,986 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 46 transitions. [2022-03-15 21:34:54,987 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:55,480 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [87371#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 87375#(and (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 2 counter) (not (< (+ 2 j1) M1))) (or (<= counter 2) (not (< (+ 2 j1) M1)))), 87373#(and (or (not (< j1 M1)) (<= 4 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter 4) (not (< j1 M1))) (or (not (< j1 M1)) (<= (+ j2 4) j1))), 87374#(and (or (<= counter 3) (not (< (+ j1 1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= 3 counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 87377#(< j1 M1), 87378#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 87376#(and (or (not (< (+ 3 j1) M1)) (<= counter 1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= 1 counter))), 87372#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:34:55,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:34:55,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:55,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:34:55,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=558, Invalid=2864, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:34:55,481 INFO L87 Difference]: Start difference. First operand 510 states and 1302 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 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 21:34:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:58,338 INFO L93 Difference]: Finished difference Result 1544 states and 3179 transitions. [2022-03-15 21:34:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-15 21:34:58,338 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:34:58,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:58,340 INFO L225 Difference]: With dead ends: 1544 [2022-03-15 21:34:58,340 INFO L226 Difference]: Without dead ends: 1538 [2022-03-15 21:34:58,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2359, Invalid=10523, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 21:34:58,341 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 232 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:58,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 0 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:34:58,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2022-03-15 21:34:58,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 507. [2022-03-15 21:34:58,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 2.5573122529644268) internal successors, (1294), 506 states have internal predecessors, (1294), 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 21:34:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 1294 transitions. [2022-03-15 21:34:58,352 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 1294 transitions. Word has length 24 [2022-03-15 21:34:58,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:58,352 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 1294 transitions. [2022-03-15 21:34:58,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 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 21:34:58,352 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 1294 transitions. [2022-03-15 21:34:58,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:34:58,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:58,353 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:58,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-15 21:34:58,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-15 21:34:58,565 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:58,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:58,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1995695433, now seen corresponding path program 77 times [2022-03-15 21:34:58,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:58,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914504387] [2022-03-15 21:34:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:58,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:58,762 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:58,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914504387] [2022-03-15 21:34:58,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914504387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:58,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309963675] [2022-03-15 21:34:58,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:34:58,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:58,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:58,764 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:34:58,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-15 21:34:58,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:34:58,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:58,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:34:58,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:59,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:00,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309963675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:00,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:00,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 49 [2022-03-15 21:35:00,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [428233138] [2022-03-15 21:35:00,300 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:00,301 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:00,304 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 48 transitions. [2022-03-15 21:35:00,304 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:00,776 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [90237#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter 3)) (or (not (< j1 M1)) (<= 3 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 90242#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 90235#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 90238#(and (or (<= 2 counter) (not (< (+ j1 1) M1))) (or (<= counter 2) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 90241#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 90236#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 90239#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ 2 j1) M1))) (or (<= 1 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 90240#(< j1 M1)] [2022-03-15 21:35:00,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:35:00,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:00,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:35:00,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=520, Invalid=2786, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:35:00,777 INFO L87 Difference]: Start difference. First operand 507 states and 1294 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 21:35:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:02,782 INFO L93 Difference]: Finished difference Result 1685 states and 3445 transitions. [2022-03-15 21:35:02,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:35:02,782 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:02,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:02,789 INFO L225 Difference]: With dead ends: 1685 [2022-03-15 21:35:02,789 INFO L226 Difference]: Without dead ends: 1673 [2022-03-15 21:35:02,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1777, Invalid=8123, Unknown=0, NotChecked=0, Total=9900 [2022-03-15 21:35:02,789 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 212 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:02,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 0 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:02,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-03-15 21:35:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 499. [2022-03-15 21:35:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 498 states have (on average 2.5562248995983934) internal successors, (1273), 498 states have internal predecessors, (1273), 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 21:35:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 1273 transitions. [2022-03-15 21:35:02,799 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 1273 transitions. Word has length 24 [2022-03-15 21:35:02,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:02,799 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 1273 transitions. [2022-03-15 21:35:02,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 21:35:02,799 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 1273 transitions. [2022-03-15 21:35:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:02,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:02,800 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:02,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:03,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:03,015 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:03,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:03,016 INFO L85 PathProgramCache]: Analyzing trace with hash 207217721, now seen corresponding path program 78 times [2022-03-15 21:35:03,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:03,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953782832] [2022-03-15 21:35:03,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:03,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:03,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:03,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953782832] [2022-03-15 21:35:03,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953782832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:03,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510811245] [2022-03-15 21:35:03,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:03,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:03,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:03,211 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:03,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-15 21:35:03,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:35:03,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:03,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 21:35:03,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:03,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:04,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510811245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:04,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:04,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 18] total 51 [2022-03-15 21:35:04,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2013289251] [2022-03-15 21:35:04,762 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:04,763 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:04,766 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 50 transitions. [2022-03-15 21:35:04,766 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:05,274 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [93201#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 93207#(< j1 M1), 93200#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 93202#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 93206#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 93203#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 93204#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 93205#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:35:05,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:35:05,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:35:05,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=2916, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:35:05,275 INFO L87 Difference]: Start difference. First operand 499 states and 1273 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 21:35:06,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:06,996 INFO L93 Difference]: Finished difference Result 1723 states and 3517 transitions. [2022-03-15 21:35:06,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:35:06,997 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 24 [2022-03-15 21:35:06,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:06,999 INFO L225 Difference]: With dead ends: 1723 [2022-03-15 21:35:06,999 INFO L226 Difference]: Without dead ends: 1695 [2022-03-15 21:35:06,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1979 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1826, Invalid=7876, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 21:35:07,000 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 201 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:07,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 0 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:07,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-03-15 21:35:07,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 503. [2022-03-15 21:35:07,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.551792828685259) internal successors, (1281), 502 states have internal predecessors, (1281), 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 21:35:07,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1281 transitions. [2022-03-15 21:35:07,008 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1281 transitions. Word has length 24 [2022-03-15 21:35:07,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:07,008 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1281 transitions. [2022-03-15 21:35:07,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 21:35:07,008 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1281 transitions. [2022-03-15 21:35:07,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:07,009 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:07,009 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:07,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:07,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:07,217 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:07,218 INFO L85 PathProgramCache]: Analyzing trace with hash 537068873, now seen corresponding path program 79 times [2022-03-15 21:35:07,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:07,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331938051] [2022-03-15 21:35:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:07,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:07,423 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:07,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:07,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331938051] [2022-03-15 21:35:07,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331938051] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:07,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614789691] [2022-03-15 21:35:07,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:35:07,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:07,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:07,424 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:07,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-15 21:35:07,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:07,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 21:35:07,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:07,936 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:07,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:08,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:08,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614789691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:08,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:08,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 51 [2022-03-15 21:35:08,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1629558480] [2022-03-15 21:35:08,677 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:08,678 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:08,682 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 21:35:08,682 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:09,012 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [96206#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 96210#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 96207#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 96208#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 96205#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 96209#(< j1 M1)] [2022-03-15 21:35:09,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:35:09,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:09,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:35:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2813, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:35:09,013 INFO L87 Difference]: Start difference. First operand 503 states and 1281 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 21:35:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:10,451 INFO L93 Difference]: Finished difference Result 1633 states and 3438 transitions. [2022-03-15 21:35:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 21:35:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:10,453 INFO L225 Difference]: With dead ends: 1633 [2022-03-15 21:35:10,453 INFO L226 Difference]: Without dead ends: 1619 [2022-03-15 21:35:10,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1580, Invalid=7350, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 21:35:10,454 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 167 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:10,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 0 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-03-15 21:35:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 626. [2022-03-15 21:35:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.6096) internal successors, (1631), 625 states have internal predecessors, (1631), 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 21:35:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1631 transitions. [2022-03-15 21:35:10,463 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1631 transitions. Word has length 24 [2022-03-15 21:35:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:10,463 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1631 transitions. [2022-03-15 21:35:10,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 21:35:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1631 transitions. [2022-03-15 21:35:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:10,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:10,464 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:10,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-15 21:35:10,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:10,665 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:10,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1609101887, now seen corresponding path program 80 times [2022-03-15 21:35:10,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:10,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493305025] [2022-03-15 21:35:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:10,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:10,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:10,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493305025] [2022-03-15 21:35:10,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493305025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:10,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055601164] [2022-03-15 21:35:10,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:35:10,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:10,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:10,865 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:10,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-15 21:35:10,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:35:10,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:10,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 21:35:10,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:11,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:12,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055601164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:12,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:12,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2022-03-15 21:35:12,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1495955873] [2022-03-15 21:35:12,013 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:12,015 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:12,018 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 48 transitions. [2022-03-15 21:35:12,021 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:12,426 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [99359#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 99363#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 99364#(< j1 M1), 99361#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 99292#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 99362#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 99360#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 21:35:12,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:35:12,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:12,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:35:12,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2728, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:35:12,427 INFO L87 Difference]: Start difference. First operand 626 states and 1631 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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 21:35:13,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:13,569 INFO L93 Difference]: Finished difference Result 1151 states and 2523 transitions. [2022-03-15 21:35:13,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:35:13,569 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:13,570 INFO L225 Difference]: With dead ends: 1151 [2022-03-15 21:35:13,570 INFO L226 Difference]: Without dead ends: 1133 [2022-03-15 21:35:13,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1221, Invalid=6261, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:35:13,571 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 149 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:13,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 0 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:13,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-03-15 21:35:13,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 556. [2022-03-15 21:35:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.5495495495495497) internal successors, (1415), 555 states have internal predecessors, (1415), 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 21:35:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1415 transitions. [2022-03-15 21:35:13,579 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1415 transitions. Word has length 24 [2022-03-15 21:35:13,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:13,579 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 1415 transitions. [2022-03-15 21:35:13,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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 21:35:13,579 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1415 transitions. [2022-03-15 21:35:13,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:13,580 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:13,580 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:13,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-15 21:35:13,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:13,780 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:13,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:13,781 INFO L85 PathProgramCache]: Analyzing trace with hash 579081289, now seen corresponding path program 81 times [2022-03-15 21:35:13,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:13,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233839112] [2022-03-15 21:35:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:13,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:13,963 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:13,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:13,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233839112] [2022-03-15 21:35:13,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233839112] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:13,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122627529] [2022-03-15 21:35:13,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:35:13,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:13,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:13,964 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:13,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-15 21:35:13,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:35:13,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:13,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:35:13,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:14,472 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:14,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:15,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122627529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:15,209 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:15,209 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 53 [2022-03-15 21:35:15,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1925149842] [2022-03-15 21:35:15,209 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:15,210 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:15,213 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 21:35:15,214 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:15,710 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [101881#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 101882#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 101887#(< j1 M1), 101883#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 101884#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 101885#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 101880#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 101886#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4)))] [2022-03-15 21:35:15,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:35:15,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:15,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:35:15,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=3208, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:35:15,711 INFO L87 Difference]: Start difference. First operand 556 states and 1415 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 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 21:35:17,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:17,329 INFO L93 Difference]: Finished difference Result 1206 states and 2549 transitions. [2022-03-15 21:35:17,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:35:17,330 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:17,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:17,331 INFO L225 Difference]: With dead ends: 1206 [2022-03-15 21:35:17,331 INFO L226 Difference]: Without dead ends: 1176 [2022-03-15 21:35:17,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1919, Invalid=9001, Unknown=0, NotChecked=0, Total=10920 [2022-03-15 21:35:17,332 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 191 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:17,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 0 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:17,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-03-15 21:35:17,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 506. [2022-03-15 21:35:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.5485148514851486) internal successors, (1287), 505 states have internal predecessors, (1287), 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 21:35:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1287 transitions. [2022-03-15 21:35:17,345 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1287 transitions. Word has length 24 [2022-03-15 21:35:17,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:17,345 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 1287 transitions. [2022-03-15 21:35:17,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 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 21:35:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1287 transitions. [2022-03-15 21:35:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:17,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:17,345 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:17,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-15 21:35:17,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:17,546 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:17,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:17,546 INFO L85 PathProgramCache]: Analyzing trace with hash -564259527, now seen corresponding path program 82 times [2022-03-15 21:35:17,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:17,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993414352] [2022-03-15 21:35:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:17,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:17,690 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:17,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:17,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993414352] [2022-03-15 21:35:17,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993414352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:17,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694937705] [2022-03-15 21:35:17,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:35:17,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:17,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:17,691 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:17,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-15 21:35:17,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:35:17,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:17,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:35:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:18,187 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:18,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:18,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694937705] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:18,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:18,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 50 [2022-03-15 21:35:18,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [606783001] [2022-03-15 21:35:18,799 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:18,800 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:18,803 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 21:35:18,803 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:19,016 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [104384#(< j1 M1), 104381#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 104383#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 104382#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:35:19,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:35:19,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:19,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:35:19,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2490, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:35:19,017 INFO L87 Difference]: Start difference. First operand 506 states and 1287 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 21:35:20,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:20,469 INFO L93 Difference]: Finished difference Result 1320 states and 2900 transitions. [2022-03-15 21:35:20,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 21:35:20,469 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 24 [2022-03-15 21:35:20,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:20,471 INFO L225 Difference]: With dead ends: 1320 [2022-03-15 21:35:20,471 INFO L226 Difference]: Without dead ends: 1314 [2022-03-15 21:35:20,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2510 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1885, Invalid=7817, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 21:35:20,472 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 160 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:20,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 0 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:35:20,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2022-03-15 21:35:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 642. [2022-03-15 21:35:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 2.6209048361934477) internal successors, (1680), 641 states have internal predecessors, (1680), 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 21:35:20,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 1680 transitions. [2022-03-15 21:35:20,480 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 1680 transitions. Word has length 24 [2022-03-15 21:35:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:20,480 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 1680 transitions. [2022-03-15 21:35:20,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 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 21:35:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 1680 transitions. [2022-03-15 21:35:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:20,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:20,481 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:20,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:20,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-15 21:35:20,682 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1880416831, now seen corresponding path program 83 times [2022-03-15 21:35:20,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:20,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389798658] [2022-03-15 21:35:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:20,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:20,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:20,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389798658] [2022-03-15 21:35:20,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389798658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:20,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103977767] [2022-03-15 21:35:20,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:35:20,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:20,855 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:20,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-15 21:35:20,883 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:35:20,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-15 21:35:20,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:21,263 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:21,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:21,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103977767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:21,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:21,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 49 [2022-03-15 21:35:21,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [888837339] [2022-03-15 21:35:21,873 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:21,879 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:21,882 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 42 transitions. [2022-03-15 21:35:21,882 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:22,141 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [107268#(< j1 M1), 107267#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 107265#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 107266#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 107269#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:35:22,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:35:22,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:22,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:35:22,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=2541, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:35:22,142 INFO L87 Difference]: Start difference. First operand 642 states and 1680 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 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 21:35:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:23,640 INFO L93 Difference]: Finished difference Result 1274 states and 2810 transitions. [2022-03-15 21:35:23,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 21:35:23,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:23,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:23,642 INFO L225 Difference]: With dead ends: 1274 [2022-03-15 21:35:23,642 INFO L226 Difference]: Without dead ends: 1266 [2022-03-15 21:35:23,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2828 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1808, Invalid=8292, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 21:35:23,642 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 172 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:23,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 0 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-03-15 21:35:23,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 638. [2022-03-15 21:35:23,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 2.610675039246468) internal successors, (1663), 637 states have internal predecessors, (1663), 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 21:35:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1663 transitions. [2022-03-15 21:35:23,651 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1663 transitions. Word has length 24 [2022-03-15 21:35:23,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:23,651 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1663 transitions. [2022-03-15 21:35:23,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 21 states have internal predecessors, (38), 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 21:35:23,651 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1663 transitions. [2022-03-15 21:35:23,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:23,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:23,652 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:23,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:23,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:23,852 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:23,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:23,852 INFO L85 PathProgramCache]: Analyzing trace with hash 268379705, now seen corresponding path program 84 times [2022-03-15 21:35:23,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:23,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945704298] [2022-03-15 21:35:23,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:23,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:23,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:24,039 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:24,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945704298] [2022-03-15 21:35:24,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945704298] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:24,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360238835] [2022-03-15 21:35:24,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:24,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:24,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:24,040 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:24,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-15 21:35:24,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:35:24,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:24,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 21:35:24,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:24,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:25,208 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:25,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360238835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:25,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:25,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 52 [2022-03-15 21:35:25,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2126027667] [2022-03-15 21:35:25,208 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:25,209 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:25,213 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 46 transitions. [2022-03-15 21:35:25,213 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:25,572 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [110104#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 110106#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 110108#(< j1 M1), 110103#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 110107#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 110105#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:35:25,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:35:25,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:25,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:35:25,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=2930, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:35:25,573 INFO L87 Difference]: Start difference. First operand 638 states and 1663 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:27,047 INFO L93 Difference]: Finished difference Result 1126 states and 2523 transitions. [2022-03-15 21:35:27,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 21:35:27,047 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:27,049 INFO L225 Difference]: With dead ends: 1126 [2022-03-15 21:35:27,049 INFO L226 Difference]: Without dead ends: 1116 [2022-03-15 21:35:27,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1677, Invalid=7829, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 21:35:27,049 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 223 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:27,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 0 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:27,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2022-03-15 21:35:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 626. [2022-03-15 21:35:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 2.5952) internal successors, (1622), 625 states have internal predecessors, (1622), 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 21:35:27,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1622 transitions. [2022-03-15 21:35:27,058 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1622 transitions. Word has length 24 [2022-03-15 21:35:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:27,058 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1622 transitions. [2022-03-15 21:35:27,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1622 transitions. [2022-03-15 21:35:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:27,059 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:27,059 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:27,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-15 21:35:27,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:27,259 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:27,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:27,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1838404415, now seen corresponding path program 85 times [2022-03-15 21:35:27,260 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:27,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476482320] [2022-03-15 21:35:27,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:27,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:27,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:27,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476482320] [2022-03-15 21:35:27,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476482320] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:27,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364685394] [2022-03-15 21:35:27,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:35:27,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:27,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:27,481 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:27,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-15 21:35:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:27,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:35:27,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:28,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:28,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364685394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:28,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:28,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 53 [2022-03-15 21:35:28,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1699302744] [2022-03-15 21:35:28,706 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:28,708 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:28,712 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 50 transitions. [2022-03-15 21:35:28,712 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:29,173 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [112762#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 112759#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 112761#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 112758#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 112763#(< j1 M1), 112760#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 112757#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:35:29,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:35:29,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:29,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:35:29,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=3132, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:35:29,174 INFO L87 Difference]: Start difference. First operand 626 states and 1622 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 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 21:35:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:30,178 INFO L93 Difference]: Finished difference Result 887 states and 2039 transitions. [2022-03-15 21:35:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:35:30,179 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:30,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:30,180 INFO L225 Difference]: With dead ends: 887 [2022-03-15 21:35:30,180 INFO L226 Difference]: Without dead ends: 875 [2022-03-15 21:35:30,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1217, Invalid=6265, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:35:30,180 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 190 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:30,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 0 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:30,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-03-15 21:35:30,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 558. [2022-03-15 21:35:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 2.540394973070018) internal successors, (1415), 557 states have internal predecessors, (1415), 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 21:35:30,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 1415 transitions. [2022-03-15 21:35:30,186 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 1415 transitions. Word has length 24 [2022-03-15 21:35:30,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:30,187 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 1415 transitions. [2022-03-15 21:35:30,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 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 21:35:30,187 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 1415 transitions. [2022-03-15 21:35:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:30,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:30,187 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:30,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:30,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:30,388 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:30,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1570764601, now seen corresponding path program 86 times [2022-03-15 21:35:30,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:30,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267424582] [2022-03-15 21:35:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:30,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:30,574 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:30,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:30,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267424582] [2022-03-15 21:35:30,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267424582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:30,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561578306] [2022-03-15 21:35:30,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:35:30,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:30,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:30,575 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:30,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-15 21:35:30,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:35:30,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 21:35:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:31,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:31,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561578306] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:31,615 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:31,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 52 [2022-03-15 21:35:31,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2088760187] [2022-03-15 21:35:31,616 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:31,617 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:31,620 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 54 transitions. [2022-03-15 21:35:31,620 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:32,141 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [114943#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 115016#(< j1 M1), 115015#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 115013#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 115011#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 115014#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 115012#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 115010#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:35:32,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:35:32,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:32,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:35:32,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=3007, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:35:32,141 INFO L87 Difference]: Start difference. First operand 558 states and 1415 transitions. Second operand has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 states have internal predecessors, (47), 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 21:35:33,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:33,447 INFO L93 Difference]: Finished difference Result 841 states and 1906 transitions. [2022-03-15 21:35:33,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:35:33,447 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:33,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:33,452 INFO L225 Difference]: With dead ends: 841 [2022-03-15 21:35:33,452 INFO L226 Difference]: Without dead ends: 827 [2022-03-15 21:35:33,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1527, Invalid=7403, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 21:35:33,453 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 194 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:33,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 0 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:35:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-03-15 21:35:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 508. [2022-03-15 21:35:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.546351084812623) internal successors, (1291), 507 states have internal predecessors, (1291), 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 21:35:33,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1291 transitions. [2022-03-15 21:35:33,458 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1291 transitions. Word has length 24 [2022-03-15 21:35:33,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:33,459 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1291 transitions. [2022-03-15 21:35:33,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6785714285714286) internal successors, (47), 27 states have internal predecessors, (47), 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 21:35:33,459 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1291 transitions. [2022-03-15 21:35:33,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:33,459 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:33,459 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:33,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:33,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:33,660 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:33,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:33,660 INFO L85 PathProgramCache]: Analyzing trace with hash 734860873, now seen corresponding path program 87 times [2022-03-15 21:35:33,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:33,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066542659] [2022-03-15 21:35:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:33,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:33,782 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 22 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:33,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:33,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066542659] [2022-03-15 21:35:33,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066542659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:33,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528239022] [2022-03-15 21:35:33,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:35:33,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:33,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:33,783 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:33,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-15 21:35:33,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:35:33,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:33,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 21:35:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:34,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:34,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528239022] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:34,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:34,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 48 [2022-03-15 21:35:34,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1075698458] [2022-03-15 21:35:34,842 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:34,844 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:34,846 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2022-03-15 21:35:34,846 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:34,914 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [117132#(< j1 M1), 117131#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:35:34,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:35:34,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:34,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:35:34,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=2098, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:35:34,915 INFO L87 Difference]: Start difference. First operand 508 states and 1291 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 21:35:35,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:35,317 INFO L93 Difference]: Finished difference Result 1093 states and 2432 transitions. [2022-03-15 21:35:35,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:35:35,317 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:35,318 INFO L225 Difference]: With dead ends: 1093 [2022-03-15 21:35:35,318 INFO L226 Difference]: Without dead ends: 1089 [2022-03-15 21:35:35,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=913, Invalid=3917, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:35:35,320 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 138 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:35,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 0 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:35,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-03-15 21:35:35,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 633. [2022-03-15 21:35:35,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.606012658227848) internal successors, (1647), 632 states have internal predecessors, (1647), 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 21:35:35,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1647 transitions. [2022-03-15 21:35:35,328 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1647 transitions. Word has length 24 [2022-03-15 21:35:35,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:35,328 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1647 transitions. [2022-03-15 21:35:35,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 21:35:35,328 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1647 transitions. [2022-03-15 21:35:35,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:35,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:35,329 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:35,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:35,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:35,529 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:35,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:35,530 INFO L85 PathProgramCache]: Analyzing trace with hash -138879807, now seen corresponding path program 88 times [2022-03-15 21:35:35,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:35,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600382703] [2022-03-15 21:35:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:35,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:35,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 23 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:35,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:35,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600382703] [2022-03-15 21:35:35,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600382703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:35,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820978198] [2022-03-15 21:35:35,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:35:35,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:35,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:35,656 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:35,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-15 21:35:35,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:35:35,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:35,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:35:35,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:36,046 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:36,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:36,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820978198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:36,603 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:36,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 47 [2022-03-15 21:35:36,603 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [457082705] [2022-03-15 21:35:36,603 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:36,605 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:36,613 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 21:35:36,613 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:36,750 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [119717#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 119716#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 119718#(< j1 M1)] [2022-03-15 21:35:36,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:35:36,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:36,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:35:36,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2130, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:35:36,751 INFO L87 Difference]: Start difference. First operand 633 states and 1647 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) 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 21:35:37,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:37,278 INFO L93 Difference]: Finished difference Result 1150 states and 2554 transitions. [2022-03-15 21:35:37,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:35:37,278 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) 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 24 [2022-03-15 21:35:37,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:37,280 INFO L225 Difference]: With dead ends: 1150 [2022-03-15 21:35:37,280 INFO L226 Difference]: Without dead ends: 1144 [2022-03-15 21:35:37,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=4560, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:35:37,280 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 142 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:37,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 0 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:37,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-03-15 21:35:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 639. [2022-03-15 21:35:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.603448275862069) internal successors, (1661), 638 states have internal predecessors, (1661), 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 21:35:37,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1661 transitions. [2022-03-15 21:35:37,288 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1661 transitions. Word has length 24 [2022-03-15 21:35:37,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:37,288 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1661 transitions. [2022-03-15 21:35:37,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) 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 21:35:37,288 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1661 transitions. [2022-03-15 21:35:37,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:37,289 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:37,289 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:37,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-15 21:35:37,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-15 21:35:37,490 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:37,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:37,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1455037111, now seen corresponding path program 89 times [2022-03-15 21:35:37,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:37,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594759057] [2022-03-15 21:35:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:37,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:37,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:37,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:37,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594759057] [2022-03-15 21:35:37,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594759057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:37,643 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552819311] [2022-03-15 21:35:37,643 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:35:37,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:37,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:37,644 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:37,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-15 21:35:37,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:35:37,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:37,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:35:37,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:38,049 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:38,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:38,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552819311] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:38,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:38,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 48 [2022-03-15 21:35:38,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1298308453] [2022-03-15 21:35:38,608 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:38,609 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:38,612 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 40 transitions. [2022-03-15 21:35:38,612 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:38,844 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [122382#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 122385#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 122384#(< j1 M1), 122383#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:35:38,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:35:38,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:38,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:35:38,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2335, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:35:38,844 INFO L87 Difference]: Start difference. First operand 639 states and 1661 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:39,451 INFO L93 Difference]: Finished difference Result 1133 states and 2524 transitions. [2022-03-15 21:35:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:35:39,451 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:39,453 INFO L225 Difference]: With dead ends: 1133 [2022-03-15 21:35:39,453 INFO L226 Difference]: Without dead ends: 1125 [2022-03-15 21:35:39,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1032, Invalid=4974, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:35:39,453 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 171 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:39,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 0 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-03-15 21:35:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 639. [2022-03-15 21:35:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 2.59717868338558) internal successors, (1657), 638 states have internal predecessors, (1657), 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 21:35:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 1657 transitions. [2022-03-15 21:35:39,461 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 1657 transitions. Word has length 24 [2022-03-15 21:35:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:39,461 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 1657 transitions. [2022-03-15 21:35:39,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 1657 transitions. [2022-03-15 21:35:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:39,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:39,462 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:39,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:39,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:39,663 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:39,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:39,663 INFO L85 PathProgramCache]: Analyzing trace with hash 693759425, now seen corresponding path program 90 times [2022-03-15 21:35:39,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:39,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234010023] [2022-03-15 21:35:39,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:39,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:39,808 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:39,808 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:39,808 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234010023] [2022-03-15 21:35:39,808 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234010023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:39,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662741838] [2022-03-15 21:35:39,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:39,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:39,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:39,810 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:39,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-15 21:35:39,834 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:35:39,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:39,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:35:39,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:40,212 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:40,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:40,736 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:40,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662741838] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:40,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:40,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 49 [2022-03-15 21:35:40,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2011360767] [2022-03-15 21:35:40,736 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:40,738 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:40,740 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 21:35:40,741 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:41,031 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [125036#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 125037#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 125039#(< j1 M1), 125035#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 125038#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:35:41,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:35:41,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:35:41,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=2537, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:35:41,031 INFO L87 Difference]: Start difference. First operand 639 states and 1657 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:41,643 INFO L93 Difference]: Finished difference Result 1064 states and 2390 transitions. [2022-03-15 21:35:41,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:35:41,644 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:41,645 INFO L225 Difference]: With dead ends: 1064 [2022-03-15 21:35:41,645 INFO L226 Difference]: Without dead ends: 1054 [2022-03-15 21:35:41,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1020, Invalid=5142, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 21:35:41,646 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 183 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:41,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 0 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-03-15 21:35:41,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 633. [2022-03-15 21:35:41,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.587025316455696) internal successors, (1635), 632 states have internal predecessors, (1635), 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 21:35:41,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1635 transitions. [2022-03-15 21:35:41,653 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1635 transitions. Word has length 24 [2022-03-15 21:35:41,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:41,653 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1635 transitions. [2022-03-15 21:35:41,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:41,653 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1635 transitions. [2022-03-15 21:35:41,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:41,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:41,654 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:41,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-15 21:35:41,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:41,864 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:41,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:41,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1413024695, now seen corresponding path program 91 times [2022-03-15 21:35:41,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:41,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684818244] [2022-03-15 21:35:41,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:41,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:42,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:42,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684818244] [2022-03-15 21:35:42,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684818244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:42,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206418548] [2022-03-15 21:35:42,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:35:42,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:42,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:42,019 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:42,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-15 21:35:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:42,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:35:42,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:42,421 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:42,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:42,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206418548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:42,956 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:42,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2022-03-15 21:35:42,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1677912870] [2022-03-15 21:35:42,957 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:42,971 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:42,974 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 48 transitions. [2022-03-15 21:35:42,974 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:43,368 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [127610#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 127612#(< j1 M1), 127611#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 127607#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 127608#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 127609#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:35:43,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:35:43,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:35:43,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=2733, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:35:43,369 INFO L87 Difference]: Start difference. First operand 633 states and 1635 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 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 21:35:44,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:44,015 INFO L93 Difference]: Finished difference Result 949 states and 2164 transitions. [2022-03-15 21:35:44,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:35:44,015 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:44,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:44,016 INFO L225 Difference]: With dead ends: 949 [2022-03-15 21:35:44,016 INFO L226 Difference]: Without dead ends: 937 [2022-03-15 21:35:44,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1969 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=5048, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:35:44,017 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 184 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:44,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 0 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:44,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2022-03-15 21:35:44,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 621. [2022-03-15 21:35:44,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 621 states, 620 states have (on average 2.5725806451612905) internal successors, (1595), 620 states have internal predecessors, (1595), 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 21:35:44,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 1595 transitions. [2022-03-15 21:35:44,026 INFO L78 Accepts]: Start accepts. Automaton has 621 states and 1595 transitions. Word has length 24 [2022-03-15 21:35:44,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:44,027 INFO L470 AbstractCegarLoop]: Abstraction has 621 states and 1595 transitions. [2022-03-15 21:35:44,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 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 21:35:44,027 INFO L276 IsEmpty]: Start isEmpty. Operand 621 states and 1595 transitions. [2022-03-15 21:35:44,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:44,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:44,027 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:44,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:44,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:44,243 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:44,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1996144321, now seen corresponding path program 92 times [2022-03-15 21:35:44,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:44,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052081024] [2022-03-15 21:35:44,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:44,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:44,417 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:44,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052081024] [2022-03-15 21:35:44,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052081024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:44,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850808649] [2022-03-15 21:35:44,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:35:44,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:44,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:44,418 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:44,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-15 21:35:44,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:35:44,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 21:35:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:44,891 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:44,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:45,349 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 21 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:45,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850808649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:45,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:45,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 51 [2022-03-15 21:35:45,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1358500492] [2022-03-15 21:35:45,350 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:45,351 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:45,354 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 21:35:45,354 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:45,795 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [129969#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 130041#(< j1 M1), 130038#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 130039#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 130036#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 130037#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 130040#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2)))] [2022-03-15 21:35:45,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:35:45,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:35:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2842, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:35:45,796 INFO L87 Difference]: Start difference. First operand 621 states and 1595 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 21:35:46,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:46,385 INFO L93 Difference]: Finished difference Result 782 states and 1818 transitions. [2022-03-15 21:35:46,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:35:46,385 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 24 [2022-03-15 21:35:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:46,386 INFO L225 Difference]: With dead ends: 782 [2022-03-15 21:35:46,386 INFO L226 Difference]: Without dead ends: 768 [2022-03-15 21:35:46,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1833 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=805, Invalid=4597, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:35:46,386 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 175 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:46,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 0 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:46,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-03-15 21:35:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 561. [2022-03-15 21:35:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 560 states have (on average 2.5267857142857144) internal successors, (1415), 560 states have internal predecessors, (1415), 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 21:35:46,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 1415 transitions. [2022-03-15 21:35:46,392 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 1415 transitions. Word has length 24 [2022-03-15 21:35:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:46,393 INFO L470 AbstractCegarLoop]: Abstraction has 561 states and 1415 transitions. [2022-03-15 21:35:46,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 21:35:46,393 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 1415 transitions. [2022-03-15 21:35:46,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:35:46,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:46,393 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:46,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-15 21:35:46,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:46,594 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:46,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:46,594 INFO L85 PathProgramCache]: Analyzing trace with hash 306201417, now seen corresponding path program 93 times [2022-03-15 21:35:46,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:46,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396235308] [2022-03-15 21:35:46,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:46,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:46,770 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:46,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396235308] [2022-03-15 21:35:46,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396235308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:46,770 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298619085] [2022-03-15 21:35:46,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:35:46,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:46,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:46,772 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:46,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-15 21:35:46,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:35:46,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:46,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 21:35:46,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:47,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:47,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298619085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:47,854 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:47,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 54 [2022-03-15 21:35:47,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1017109087] [2022-03-15 21:35:47,854 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:47,856 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:47,859 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 56 transitions. [2022-03-15 21:35:47,859 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:48,362 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [132178#(< j1 M1), 132176#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 132177#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 132175#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 132174#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 132173#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 132172#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 132171#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:35:48,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:35:48,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:48,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:35:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=585, Invalid=3321, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:35:48,363 INFO L87 Difference]: Start difference. First operand 561 states and 1415 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 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 21:35:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:49,250 INFO L93 Difference]: Finished difference Result 762 states and 1724 transitions. [2022-03-15 21:35:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:35:49,251 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:35:49,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:49,255 INFO L225 Difference]: With dead ends: 762 [2022-03-15 21:35:49,256 INFO L226 Difference]: Without dead ends: 732 [2022-03-15 21:35:49,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1301, Invalid=6355, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 21:35:49,256 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 164 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:49,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 0 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:49,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-15 21:35:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 577. [2022-03-15 21:35:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 2.5260416666666665) internal successors, (1455), 576 states have internal predecessors, (1455), 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 21:35:49,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1455 transitions. [2022-03-15 21:35:49,262 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1455 transitions. Word has length 24 [2022-03-15 21:35:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:49,262 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 1455 transitions. [2022-03-15 21:35:49,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 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 21:35:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1455 transitions. [2022-03-15 21:35:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:35:49,263 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:49,263 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:49,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-15 21:35:49,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:49,464 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:49,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:49,464 INFO L85 PathProgramCache]: Analyzing trace with hash -378104066, now seen corresponding path program 94 times [2022-03-15 21:35:49,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:49,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715187184] [2022-03-15 21:35:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:49,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:49,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:49,633 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:49,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715187184] [2022-03-15 21:35:49,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715187184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:49,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161944812] [2022-03-15 21:35:49,633 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:35:49,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:49,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:49,634 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:49,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-15 21:35:49,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:35:49,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:49,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 21:35:49,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:50,046 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:50,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 36 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:50,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161944812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:50,622 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:50,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 55 [2022-03-15 21:35:50,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [864858998] [2022-03-15 21:35:50,622 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:50,623 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:50,628 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 81 transitions. [2022-03-15 21:35:50,628 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:51,336 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 19 new interpolants: [134353#(or (< j1 M1) (<= (+ j2 8) M2)), 134349#(or (< j1 M1) (<= (+ j2 4) M2)), 134359#(or (<= (+ 9 j2) M2) (< (+ 5 j1) M1) (<= M1 (+ j1 4))), 134346#(or (< j1 M1) (<= (+ j2 1) M2)), 134355#(or (<= (+ 9 j2) M2) (< (+ j1 1) M1) (<= M1 j1)), 134354#(or (<= (+ 9 j2) M2) (< j1 M1)), 134361#(or (<= (+ 9 j2) M2) (< (+ 7 j1) M1) (<= M1 (+ 6 j1))), 134351#(or (<= (+ 6 j2) M2) (< j1 M1)), 134348#(or (< j1 M1) (<= (+ 3 j2) M2)), 134356#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ 9 j2) M2)), 134345#(< j1 M1), 134347#(or (< j1 M1) (<= (+ 2 j2) M2)), 134363#(or (< (+ 9 j1) M1) (<= (+ 9 j2) M2) (<= M1 (+ j1 8))), 134350#(or (< j1 M1) (<= (+ 5 j2) M2)), 134352#(or (<= (+ 7 j2) M2) (< j1 M1)), 134360#(or (<= (+ 9 j2) M2) (<= M1 (+ 5 j1)) (< (+ 6 j1) M1)), 134357#(or (<= M1 (+ 2 j1)) (<= (+ 9 j2) M2) (< (+ 3 j1) M1)), 134358#(or (<= M1 (+ 3 j1)) (<= (+ 9 j2) M2) (< (+ j1 4) M1)), 134362#(or (<= (+ 9 j2) M2) (< (+ j1 8) M1) (<= M1 (+ 7 j1)))] [2022-03-15 21:35:51,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-15 21:35:51,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-15 21:35:51,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=984, Invalid=4566, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:35:51,341 INFO L87 Difference]: Start difference. First operand 577 states and 1455 transitions. Second operand has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 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 21:35:52,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:52,267 INFO L93 Difference]: Finished difference Result 848 states and 1910 transitions. [2022-03-15 21:35:52,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:35:52,267 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 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 25 [2022-03-15 21:35:52,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:52,268 INFO L225 Difference]: With dead ends: 848 [2022-03-15 21:35:52,268 INFO L226 Difference]: Without dead ends: 792 [2022-03-15 21:35:52,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4154 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2563, Invalid=9209, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 21:35:52,269 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 175 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:52,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 0 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:52,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-03-15 21:35:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 574. [2022-03-15 21:35:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.5165794066317626) internal successors, (1442), 573 states have internal predecessors, (1442), 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 21:35:52,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1442 transitions. [2022-03-15 21:35:52,276 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1442 transitions. Word has length 25 [2022-03-15 21:35:52,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:52,276 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 1442 transitions. [2022-03-15 21:35:52,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.8) internal successors, (72), 39 states have internal predecessors, (72), 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 21:35:52,276 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1442 transitions. [2022-03-15 21:35:52,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:35:52,277 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:52,277 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:52,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:52,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-03-15 21:35:52,477 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:52,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:52,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1323616878, now seen corresponding path program 95 times [2022-03-15 21:35:52,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:52,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144265752] [2022-03-15 21:35:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:52,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:52,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:52,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144265752] [2022-03-15 21:35:52,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144265752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:52,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329037937] [2022-03-15 21:35:52,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:35:52,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:52,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:52,605 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:52,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-15 21:35:52,633 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:35:52,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:52,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 21:35:52,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:53,156 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:53,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:53,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329037937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:53,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:53,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19, 19] total 46 [2022-03-15 21:35:53,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [120949923] [2022-03-15 21:35:53,697 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:53,699 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:53,702 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 47 transitions. [2022-03-15 21:35:53,702 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:54,022 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [136622#(and (or (<= M1 (+ 3 j1)) (<= (+ j2 4) j1)) (or (<= M1 (+ 3 j1)) (= (+ (* (- 1) M1) M2) 0))), 136621#(and (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M1 (+ 2 j1)) (<= (+ 5 j2) j1))), 136624#(< j2 M2), 136620#(and (or (<= M1 (+ j1 1)) (<= (+ 6 j2) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 136626#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 6 j1))) (or (<= M1 (+ 6 j1)) (<= (+ j2 1) j1))), 136619#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= (+ 7 j2) j1) (<= M1 j1))), 136623#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 4))) (or (<= (+ 3 j2) j1) (<= M1 (+ j1 4)))), 136627#(and (or (<= j2 j1) (<= M1 (+ 7 j1))) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 7 j1)))), 136625#(and (or (<= (+ 2 j2) j1) (<= M1 (+ 5 j1))) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 5 j1))))] [2022-03-15 21:35:54,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:35:54,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:54,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:35:54,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=2410, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:35:54,023 INFO L87 Difference]: Start difference. First operand 574 states and 1442 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 21:35:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:54,468 INFO L93 Difference]: Finished difference Result 663 states and 1597 transitions. [2022-03-15 21:35:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:35:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 25 [2022-03-15 21:35:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:54,469 INFO L225 Difference]: With dead ends: 663 [2022-03-15 21:35:54,469 INFO L226 Difference]: Without dead ends: 662 [2022-03-15 21:35:54,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1590, Invalid=4890, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:35:54,470 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:54,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 0 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:54,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-15 21:35:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 574. [2022-03-15 21:35:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 2.5148342059336826) internal successors, (1441), 573 states have internal predecessors, (1441), 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 21:35:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1441 transitions. [2022-03-15 21:35:54,478 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1441 transitions. Word has length 25 [2022-03-15 21:35:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:54,478 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 1441 transitions. [2022-03-15 21:35:54,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 21:35:54,478 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1441 transitions. [2022-03-15 21:35:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:35:54,479 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:54,479 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:54,502 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-15 21:35:54,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-15 21:35:54,680 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:54,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1163533439, now seen corresponding path program 96 times [2022-03-15 21:35:54,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:54,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784583386] [2022-03-15 21:35:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:54,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:54,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:54,815 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:54,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:54,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784583386] [2022-03-15 21:35:54,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784583386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:54,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300221404] [2022-03-15 21:35:54,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:54,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:54,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:54,816 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:54,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-15 21:35:54,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:35:54,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:54,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 21:35:54,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:54,995 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:54,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:55,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300221404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:55,182 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:55,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 23 [2022-03-15 21:35:55,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1706888191] [2022-03-15 21:35:55,182 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:55,184 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:55,189 INFO L252 McrAutomatonBuilder]: Finished intersection with 57 states and 86 transitions. [2022-03-15 21:35:55,189 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:55,598 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:35:55,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:35:55,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:55,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:35:55,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:35:55,599 INFO L87 Difference]: Start difference. First operand 574 states and 1441 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 21:35:55,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:55,855 INFO L93 Difference]: Finished difference Result 849 states and 2015 transitions. [2022-03-15 21:35:55,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:35:55,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 26 [2022-03-15 21:35:55,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:55,856 INFO L225 Difference]: With dead ends: 849 [2022-03-15 21:35:55,856 INFO L226 Difference]: Without dead ends: 825 [2022-03-15 21:35:55,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:35:55,856 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:55,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 0 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-03-15 21:35:55,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 683. [2022-03-15 21:35:55,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 2.5542521994134897) internal successors, (1742), 682 states have internal predecessors, (1742), 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 21:35:55,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 1742 transitions. [2022-03-15 21:35:55,867 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 1742 transitions. Word has length 26 [2022-03-15 21:35:55,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:55,867 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 1742 transitions. [2022-03-15 21:35:55,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 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 21:35:55,867 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 1742 transitions. [2022-03-15 21:35:55,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:35:55,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:55,868 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:55,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:56,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:56,084 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:56,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:56,085 INFO L85 PathProgramCache]: Analyzing trace with hash -2060094299, now seen corresponding path program 97 times [2022-03-15 21:35:56,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:56,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481094374] [2022-03-15 21:35:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:56,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:56,306 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:56,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:56,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481094374] [2022-03-15 21:35:56,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481094374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:56,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622562994] [2022-03-15 21:35:56,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:35:56,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:56,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:56,307 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:35:56,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-15 21:35:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:56,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 21:35:56,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:56,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:59,709 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622562994] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:59,709 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:59,709 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 51 [2022-03-15 21:35:59,709 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [74009709] [2022-03-15 21:35:59,709 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:59,710 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:59,714 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 48 transitions. [2022-03-15 21:35:59,714 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:00,303 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [141088#(and (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= counter 1) (not (< (+ 6 j1) M1))) (or (<= 1 counter) (not (< (+ 6 j1) M1))) (or (not (< (+ 6 j1) M1)) (<= (+ j2 1) j1))), 141083#(and (or (not (< (+ j1 1) M1)) (<= counter 6)) (or (<= (+ 6 j2) j1) (not (< (+ j1 1) M1))) (or (<= 6 counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 141086#(and (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 3 counter)) (or (not (< (+ j1 4) M1)) (<= counter 3)) (or (not (< (+ j1 4) M1)) (<= (+ 3 j2) j1))), 141090#(and (or (not (< (+ 7 j1) M1)) (<= counter 0)) (or (not (< (+ 7 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 7 j1) M1)) (<= j2 j1)) (or (not (< (+ 7 j1) M1)) (<= 0 counter))), 141081#(< j1 M1), 141085#(and (or (not (< (+ 3 j1) M1)) (<= (+ j2 4) j1)) (or (<= counter 4) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= 4 counter))), 141082#(and (or (not (< j1 M1)) (<= counter 7)) (or (<= (+ 7 j2) j1) (not (< j1 M1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 7 counter))), 141084#(and (or (<= 5 counter) (not (< (+ 2 j1) M1))) (or (<= counter 5) (not (< (+ 2 j1) M1))) (or (<= (+ 5 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 141089#(or (< (+ j1 1) M1) (<= M1 j1)), 141087#(and (or (not (< (+ 5 j1) M1)) (<= counter 2)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ 5 j1) M1)) (<= 2 counter)))] [2022-03-15 21:36:00,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:36:00,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:00,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:36:00,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=740, Invalid=3042, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:36:00,304 INFO L87 Difference]: Start difference. First operand 683 states and 1742 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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 21:36:02,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:02,587 INFO L93 Difference]: Finished difference Result 1159 states and 2612 transitions. [2022-03-15 21:36:02,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:36:02,587 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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 26 [2022-03-15 21:36:02,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:02,588 INFO L225 Difference]: With dead ends: 1159 [2022-03-15 21:36:02,588 INFO L226 Difference]: Without dead ends: 1156 [2022-03-15 21:36:02,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1680, Invalid=6692, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 21:36:02,589 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 200 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:02,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 0 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:36:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-03-15 21:36:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 676. [2022-03-15 21:36:02,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 676 states, 675 states have (on average 2.562962962962963) internal successors, (1730), 675 states have internal predecessors, (1730), 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 21:36:02,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 676 states to 676 states and 1730 transitions. [2022-03-15 21:36:02,597 INFO L78 Accepts]: Start accepts. Automaton has 676 states and 1730 transitions. Word has length 26 [2022-03-15 21:36:02,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:02,597 INFO L470 AbstractCegarLoop]: Abstraction has 676 states and 1730 transitions. [2022-03-15 21:36:02,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 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 21:36:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 676 states and 1730 transitions. [2022-03-15 21:36:02,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:02,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:02,598 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:02,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:02,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:02,799 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:02,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:02,800 INFO L85 PathProgramCache]: Analyzing trace with hash -227001827, now seen corresponding path program 98 times [2022-03-15 21:36:02,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:02,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848338194] [2022-03-15 21:36:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:02,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:03,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:03,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848338194] [2022-03-15 21:36:03,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848338194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:03,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986294354] [2022-03-15 21:36:03,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:36:03,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:03,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:03,023 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:03,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-15 21:36:03,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:36:03,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:03,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 21:36:03,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:03,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:05,774 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 1 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:05,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986294354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:05,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:05,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 52 [2022-03-15 21:36:05,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1629186387] [2022-03-15 21:36:05,774 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:05,776 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:05,780 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 48 transitions. [2022-03-15 21:36:05,780 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:06,325 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [143867#(and (or (<= counter 5) (not (< (+ j1 1) M1))) (or (<= (+ 5 j2) j1) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 5 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 143866#(< j1 M1), 143869#(and (or (not (< (+ 3 j1) M1)) (<= (+ 3 j2) j1)) (or (not (< (+ 3 j1) M1)) (<= 3 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= counter 3))), 143865#(and (or (not (< j1 M1)) (<= (+ 6 j2) j1)) (or (<= 6 counter) (not (< j1 M1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 6))), 143870#(and (or (not (< (+ j1 4) M1)) (<= counter 2)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ j1 4) M1)) (<= 2 counter))), 143868#(and (or (<= (+ j2 4) j1) (not (< (+ 2 j1) M1))) (or (<= counter 4) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 4 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 143873#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 143872#(and (or (<= j2 j1) (not (< (+ 6 j1) M1))) (or (<= counter 0) (not (< (+ 6 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= 0 counter) (not (< (+ 6 j1) M1)))), 143871#(and (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 5 j1) M1)) (<= 1 counter)) (or (not (< (+ 5 j1) M1)) (<= counter 1)))] [2022-03-15 21:36:06,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:36:06,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:06,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:36:06,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=685, Invalid=3097, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:36:06,325 INFO L87 Difference]: Start difference. First operand 676 states and 1730 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 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 21:36:10,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:10,626 INFO L93 Difference]: Finished difference Result 1799 states and 3765 transitions. [2022-03-15 21:36:10,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-15 21:36:10,626 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 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 26 [2022-03-15 21:36:10,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:10,628 INFO L225 Difference]: With dead ends: 1799 [2022-03-15 21:36:10,628 INFO L226 Difference]: Without dead ends: 1795 [2022-03-15 21:36:10,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3108 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2936, Invalid=13066, Unknown=0, NotChecked=0, Total=16002 [2022-03-15 21:36:10,629 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 337 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:10,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 0 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:36:10,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1795 states. [2022-03-15 21:36:10,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1795 to 669. [2022-03-15 21:36:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.567365269461078) internal successors, (1715), 668 states have internal predecessors, (1715), 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 21:36:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1715 transitions. [2022-03-15 21:36:10,638 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1715 transitions. Word has length 26 [2022-03-15 21:36:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:10,638 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1715 transitions. [2022-03-15 21:36:10,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 24 states have internal predecessors, (46), 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 21:36:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1715 transitions. [2022-03-15 21:36:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:10,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:10,639 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:10,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:10,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-15 21:36:10,839 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:10,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1596929189, now seen corresponding path program 99 times [2022-03-15 21:36:10,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:10,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768241540] [2022-03-15 21:36:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:10,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:11,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:11,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768241540] [2022-03-15 21:36:11,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768241540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:11,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159140696] [2022-03-15 21:36:11,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:36:11,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:11,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:11,060 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:11,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-15 21:36:11,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:36:11,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:11,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:36:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:11,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:13,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159140696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:13,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:13,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 53 [2022-03-15 21:36:13,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1755769887] [2022-03-15 21:36:13,325 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:13,326 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:13,330 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 50 transitions. [2022-03-15 21:36:13,330 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:13,897 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [147347#(and (or (not (< j1 M1)) (<= counter 5)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 5 counter)) (or (not (< j1 M1)) (<= (+ 5 j2) j1))), 147351#(and (or (not (< (+ j1 4) M1)) (<= 1 counter)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= (+ j2 1) j1)) (or (not (< (+ j1 4) M1)) (<= counter 1))), 147350#(and (or (not (< (+ 3 j1) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= 2 counter)) (or (not (< (+ 3 j1) M1)) (<= counter 2))), 147352#(and (or (not (< (+ 5 j1) M1)) (<= j2 j1)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= counter 0)) (or (not (< (+ 5 j1) M1)) (<= 0 counter))), 147349#(and (or (<= counter 3) (not (< (+ 2 j1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 3 counter) (not (< (+ 2 j1) M1)))), 147346#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 147345#(< j1 M1), 147270#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 147348#(and (or (<= counter 4) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 4 counter)) (or (<= (+ j2 4) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 21:36:13,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:36:13,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:13,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:36:13,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3139, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:36:13,898 INFO L87 Difference]: Start difference. First operand 669 states and 1715 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 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 21:36:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:17,695 INFO L93 Difference]: Finished difference Result 2018 states and 4163 transitions. [2022-03-15 21:36:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 21:36:17,696 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 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 26 [2022-03-15 21:36:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:17,698 INFO L225 Difference]: With dead ends: 2018 [2022-03-15 21:36:17,698 INFO L226 Difference]: Without dead ends: 2012 [2022-03-15 21:36:17,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3545 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2957, Invalid=13299, Unknown=0, NotChecked=0, Total=16256 [2022-03-15 21:36:17,699 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 318 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:17,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 0 Invalid, 1041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:36:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2022-03-15 21:36:17,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 667. [2022-03-15 21:36:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.569069069069069) internal successors, (1711), 666 states have internal predecessors, (1711), 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 21:36:17,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1711 transitions. [2022-03-15 21:36:17,708 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1711 transitions. Word has length 26 [2022-03-15 21:36:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:17,708 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1711 transitions. [2022-03-15 21:36:17,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 25 states have internal predecessors, (47), 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 21:36:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1711 transitions. [2022-03-15 21:36:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:17,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:17,709 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:17,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:17,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:17,911 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash -688366563, now seen corresponding path program 100 times [2022-03-15 21:36:17,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:17,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660321980] [2022-03-15 21:36:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:17,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:18,114 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:18,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:18,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660321980] [2022-03-15 21:36:18,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660321980] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:18,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138757091] [2022-03-15 21:36:18,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:36:18,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:18,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:18,115 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:18,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-15 21:36:18,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:36:18,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:18,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:36:18,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:18,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:20,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138757091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:20,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:20,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 56 [2022-03-15 21:36:20,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [639143370] [2022-03-15 21:36:20,258 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:20,259 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:20,263 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 52 transitions. [2022-03-15 21:36:20,264 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:20,865 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [151047#(and (or (<= counter 3) (not (< (+ j1 1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= 3 counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 151050#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 151049#(and (or (not (< (+ 3 j1) M1)) (<= counter 1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= 1 counter))), 151044#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 151048#(and (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 2 counter) (not (< (+ 2 j1) M1))) (or (<= counter 2) (not (< (+ 2 j1) M1)))), 151051#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 151046#(and (or (not (< j1 M1)) (<= 4 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter 4) (not (< j1 M1))) (or (not (< j1 M1)) (<= (+ j2 4) j1))), 151052#(< j1 M1), 151045#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:36:20,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:36:20,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:20,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:36:20,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=3618, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:36:20,866 INFO L87 Difference]: Start difference. First operand 667 states and 1711 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 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 21:36:24,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:24,019 INFO L93 Difference]: Finished difference Result 2244 states and 4577 transitions. [2022-03-15 21:36:24,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-15 21:36:24,020 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 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 26 [2022-03-15 21:36:24,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:24,022 INFO L225 Difference]: With dead ends: 2244 [2022-03-15 21:36:24,022 INFO L226 Difference]: Without dead ends: 2230 [2022-03-15 21:36:24,023 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3547 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2821, Invalid=12679, Unknown=0, NotChecked=0, Total=15500 [2022-03-15 21:36:24,023 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 261 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:24,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 0 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:24,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2022-03-15 21:36:24,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 660. [2022-03-15 21:36:24,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.5705614567526553) internal successors, (1694), 659 states have internal predecessors, (1694), 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 21:36:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1694 transitions. [2022-03-15 21:36:24,035 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1694 transitions. Word has length 26 [2022-03-15 21:36:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:24,035 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1694 transitions. [2022-03-15 21:36:24,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 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 21:36:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1694 transitions. [2022-03-15 21:36:24,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:24,036 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:24,036 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:24,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:24,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:24,236 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:24,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:24,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1056656219, now seen corresponding path program 101 times [2022-03-15 21:36:24,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:24,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014246203] [2022-03-15 21:36:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:24,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:24,460 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:24,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:24,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014246203] [2022-03-15 21:36:24,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014246203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:24,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312638181] [2022-03-15 21:36:24,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:36:24,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:24,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:24,461 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:24,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-15 21:36:24,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:36:24,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:24,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:36:24,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:24,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:26,186 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 10 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:26,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312638181] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:26,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:26,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 55 [2022-03-15 21:36:26,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1399211737] [2022-03-15 21:36:26,187 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:26,188 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:26,192 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 54 transitions. [2022-03-15 21:36:26,192 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:26,726 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [154943#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 154944#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter 3)) (or (not (< j1 M1)) (<= 3 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 154947#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 154948#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 154946#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ 2 j1) M1))) (or (<= 1 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 154949#(< j1 M1), 154941#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 154945#(and (or (<= 2 counter) (not (< (+ j1 1) M1))) (or (<= counter 2) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 154942#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:36:26,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:36:26,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:26,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:36:26,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=624, Invalid=3536, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:36:26,727 INFO L87 Difference]: Start difference. First operand 660 states and 1694 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 21:36:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:28,901 INFO L93 Difference]: Finished difference Result 2407 states and 4870 transitions. [2022-03-15 21:36:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:36:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 26 [2022-03-15 21:36:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:28,904 INFO L225 Difference]: With dead ends: 2407 [2022-03-15 21:36:28,904 INFO L226 Difference]: Without dead ends: 2377 [2022-03-15 21:36:28,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3012 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1998, Invalid=9774, Unknown=0, NotChecked=0, Total=11772 [2022-03-15 21:36:28,905 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 220 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:28,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 0 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:36:28,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2377 states. [2022-03-15 21:36:28,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2377 to 660. [2022-03-15 21:36:28,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 660 states, 659 states have (on average 2.5705614567526553) internal successors, (1694), 659 states have internal predecessors, (1694), 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 21:36:28,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 660 states to 660 states and 1694 transitions. [2022-03-15 21:36:28,920 INFO L78 Accepts]: Start accepts. Automaton has 660 states and 1694 transitions. Word has length 26 [2022-03-15 21:36:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:28,920 INFO L470 AbstractCegarLoop]: Abstraction has 660 states and 1694 transitions. [2022-03-15 21:36:28,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 21:36:28,920 INFO L276 IsEmpty]: Start isEmpty. Operand 660 states and 1694 transitions. [2022-03-15 21:36:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:28,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:28,921 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:28,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:29,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-15 21:36:29,122 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:29,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:29,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1796819051, now seen corresponding path program 102 times [2022-03-15 21:36:29,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:29,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414226373] [2022-03-15 21:36:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:29,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 14 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:29,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:29,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414226373] [2022-03-15 21:36:29,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414226373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:29,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691169049] [2022-03-15 21:36:29,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:36:29,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:29,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:29,340 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:29,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-15 21:36:29,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:36:29,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:29,370 WARN L261 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 21:36:29,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:29,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:31,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691169049] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:31,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:31,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 20] total 56 [2022-03-15 21:36:31,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1569977461] [2022-03-15 21:36:31,068 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:31,069 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:31,072 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 52 transitions. [2022-03-15 21:36:31,073 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:31,612 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [158975#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 158976#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 158973#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 158977#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 158978#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 158979#(< j1 M1), 158974#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 158972#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:36:31,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:36:31,612 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:31,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:36:31,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=720, Invalid=3440, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:36:31,612 INFO L87 Difference]: Start difference. First operand 660 states and 1694 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 21:36:33,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:33,210 INFO L93 Difference]: Finished difference Result 1978 states and 4174 transitions. [2022-03-15 21:36:33,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:36:33,210 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 26 [2022-03-15 21:36:33,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:33,212 INFO L225 Difference]: With dead ends: 1978 [2022-03-15 21:36:33,212 INFO L226 Difference]: Without dead ends: 1954 [2022-03-15 21:36:33,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1766, Invalid=7740, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 21:36:33,213 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 190 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:33,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 0 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:36:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2022-03-15 21:36:33,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 726. [2022-03-15 21:36:33,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 2.569655172413793) internal successors, (1863), 725 states have internal predecessors, (1863), 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 21:36:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1863 transitions. [2022-03-15 21:36:33,223 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1863 transitions. Word has length 26 [2022-03-15 21:36:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:33,223 INFO L470 AbstractCegarLoop]: Abstraction has 726 states and 1863 transitions. [2022-03-15 21:36:33,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 21:36:33,223 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1863 transitions. [2022-03-15 21:36:33,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:33,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:33,224 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:33,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:33,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-15 21:36:33,425 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash 391364125, now seen corresponding path program 103 times [2022-03-15 21:36:33,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:33,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995645275] [2022-03-15 21:36:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:33,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:33,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:33,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995645275] [2022-03-15 21:36:33,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995645275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:33,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688940273] [2022-03-15 21:36:33,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:36:33,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:33,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:33,624 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:33,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-15 21:36:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:36:33,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:34,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:35,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688940273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:35,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:35,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 56 [2022-03-15 21:36:35,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [491889965] [2022-03-15 21:36:35,074 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:35,075 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:35,080 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 56 transitions. [2022-03-15 21:36:35,081 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:35,623 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [162684#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 162683#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 162691#(< j1 M1), 162685#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 162686#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 162689#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 162687#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 162690#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 162688#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:36:35,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:36:35,624 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:35,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:36:35,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=3667, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:36:35,624 INFO L87 Difference]: Start difference. First operand 726 states and 1863 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 21:36:37,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:37,767 INFO L93 Difference]: Finished difference Result 1907 states and 3919 transitions. [2022-03-15 21:36:37,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 21:36:37,767 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 26 [2022-03-15 21:36:37,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:37,769 INFO L225 Difference]: With dead ends: 1907 [2022-03-15 21:36:37,769 INFO L226 Difference]: Without dead ends: 1871 [2022-03-15 21:36:37,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3590 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2270, Invalid=11070, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 21:36:37,770 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 218 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:37,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 0 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1871 states. [2022-03-15 21:36:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1871 to 664. [2022-03-15 21:36:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.5671191553544497) internal successors, (1702), 663 states have internal predecessors, (1702), 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 21:36:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1702 transitions. [2022-03-15 21:36:37,779 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1702 transitions. Word has length 26 [2022-03-15 21:36:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:37,779 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1702 transitions. [2022-03-15 21:36:37,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 21:36:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1702 transitions. [2022-03-15 21:36:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:37,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:37,780 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:37,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-15 21:36:37,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:37,981 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1227954989, now seen corresponding path program 104 times [2022-03-15 21:36:37,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:37,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686538116] [2022-03-15 21:36:37,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:37,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:38,152 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:38,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:38,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686538116] [2022-03-15 21:36:38,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686538116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:38,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990990767] [2022-03-15 21:36:38,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:36:38,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:38,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:38,153 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:38,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-15 21:36:38,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:36:38,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:36:38,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:38,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:39,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990990767] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:39,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:39,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 54 [2022-03-15 21:36:39,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2141009956] [2022-03-15 21:36:39,518 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:39,519 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:39,523 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 46 transitions. [2022-03-15 21:36:39,523 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:39,895 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [166236#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 166235#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 166157#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 166232#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 166234#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 166233#(< j1 M1)] [2022-03-15 21:36:39,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:36:39,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:39,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:36:39,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=3004, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:36:39,895 INFO L87 Difference]: Start difference. First operand 664 states and 1702 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 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 21:36:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:41,868 INFO L93 Difference]: Finished difference Result 2319 states and 4840 transitions. [2022-03-15 21:36:41,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-15 21:36:41,869 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 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 26 [2022-03-15 21:36:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:41,871 INFO L225 Difference]: With dead ends: 2319 [2022-03-15 21:36:41,871 INFO L226 Difference]: Without dead ends: 2305 [2022-03-15 21:36:41,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3432 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2285, Invalid=10147, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 21:36:41,872 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 200 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:41,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 0 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:36:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2305 states. [2022-03-15 21:36:41,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2305 to 828. [2022-03-15 21:36:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 2.6275695284159615) internal successors, (2173), 827 states have internal predecessors, (2173), 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 21:36:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2173 transitions. [2022-03-15 21:36:41,889 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2173 transitions. Word has length 26 [2022-03-15 21:36:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:41,889 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 2173 transitions. [2022-03-15 21:36:41,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 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 21:36:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2173 transitions. [2022-03-15 21:36:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:41,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:41,890 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:41,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-15 21:36:42,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:42,090 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:42,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:42,091 INFO L85 PathProgramCache]: Analyzing trace with hash -918215771, now seen corresponding path program 105 times [2022-03-15 21:36:42,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:42,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818495509] [2022-03-15 21:36:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 19 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:42,289 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:42,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818495509] [2022-03-15 21:36:42,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818495509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:42,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21624741] [2022-03-15 21:36:42,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:36:42,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:42,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:42,290 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:42,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-15 21:36:42,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:36:42,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:42,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:36:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:42,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:43,726 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:43,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21624741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:43,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:43,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 57 [2022-03-15 21:36:43,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [546513704] [2022-03-15 21:36:43,726 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:43,727 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:43,731 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 50 transitions. [2022-03-15 21:36:43,731 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:44,160 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [170529#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 170525#(< j1 M1), 170530#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 170526#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 170527#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 170524#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 170528#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:36:44,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:36:44,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:44,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:36:44,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=3548, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:36:44,161 INFO L87 Difference]: Start difference. First operand 828 states and 2173 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 21:36:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:45,972 INFO L93 Difference]: Finished difference Result 1919 states and 4103 transitions. [2022-03-15 21:36:45,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-15 21:36:45,973 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 26 [2022-03-15 21:36:45,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:45,975 INFO L225 Difference]: With dead ends: 1919 [2022-03-15 21:36:45,975 INFO L226 Difference]: Without dead ends: 1901 [2022-03-15 21:36:45,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3300 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2205, Invalid=10227, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 21:36:45,976 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 215 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:45,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 0 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:36:45,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1901 states. [2022-03-15 21:36:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1901 to 813. [2022-03-15 21:36:45,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 2.6133004926108376) internal successors, (2122), 812 states have internal predecessors, (2122), 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 21:36:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2122 transitions. [2022-03-15 21:36:45,986 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2122 transitions. Word has length 26 [2022-03-15 21:36:45,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:45,986 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 2122 transitions. [2022-03-15 21:36:45,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 21:36:45,986 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2122 transitions. [2022-03-15 21:36:45,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:45,987 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:45,987 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:46,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-15 21:36:46,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-03-15 21:36:46,188 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:46,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:46,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1269967405, now seen corresponding path program 106 times [2022-03-15 21:36:46,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:46,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707677416] [2022-03-15 21:36:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:46,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:46,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:46,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707677416] [2022-03-15 21:36:46,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707677416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:46,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814759338] [2022-03-15 21:36:46,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:36:46,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:46,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:46,387 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:46,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-15 21:36:46,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:36:46,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:46,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:36:46,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:46,974 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:46,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:47,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814759338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:47,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:47,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 58 [2022-03-15 21:36:47,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1657264027] [2022-03-15 21:36:47,778 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:47,779 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:47,783 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 54 transitions. [2022-03-15 21:36:47,783 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:48,282 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [174384#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 174385#(< j1 M1), 174386#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 174380#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 174379#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 174383#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 174381#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 174382#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:36:48,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:36:48,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:48,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:36:48,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=3797, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:36:48,283 INFO L87 Difference]: Start difference. First operand 813 states and 2122 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 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 21:36:49,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:49,685 INFO L93 Difference]: Finished difference Result 1431 states and 3171 transitions. [2022-03-15 21:36:49,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:36:49,685 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 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 26 [2022-03-15 21:36:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:49,687 INFO L225 Difference]: With dead ends: 1431 [2022-03-15 21:36:49,687 INFO L226 Difference]: Without dead ends: 1409 [2022-03-15 21:36:49,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1637, Invalid=8463, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 21:36:49,687 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 179 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:49,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 0 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:36:49,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2022-03-15 21:36:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 728. [2022-03-15 21:36:49,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 727 states have (on average 2.56121045392022) internal successors, (1862), 727 states have internal predecessors, (1862), 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 21:36:49,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 1862 transitions. [2022-03-15 21:36:49,696 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 1862 transitions. Word has length 26 [2022-03-15 21:36:49,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:49,696 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 1862 transitions. [2022-03-15 21:36:49,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 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 21:36:49,696 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 1862 transitions. [2022-03-15 21:36:49,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:49,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:49,697 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:49,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:49,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-15 21:36:49,897 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:49,897 INFO L85 PathProgramCache]: Analyzing trace with hash 384169125, now seen corresponding path program 107 times [2022-03-15 21:36:49,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:49,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449055346] [2022-03-15 21:36:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:49,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:50,121 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:50,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449055346] [2022-03-15 21:36:50,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449055346] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:50,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301285171] [2022-03-15 21:36:50,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:36:50,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:50,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:50,122 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:50,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-15 21:36:50,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:36:50,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:36:50,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:50,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:51,431 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:51,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301285171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:51,431 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:51,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2022-03-15 21:36:51,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1680566294] [2022-03-15 21:36:51,431 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:51,432 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:51,443 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 58 transitions. [2022-03-15 21:36:51,444 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:51,999 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [177552#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 177553#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 177550#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 177557#(< j1 M1), 177554#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 177558#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 177556#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 177551#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 177555#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4)))] [2022-03-15 21:36:51,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:36:51,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:52,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:36:52,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=3784, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:36:52,000 INFO L87 Difference]: Start difference. First operand 728 states and 1862 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 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 21:36:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:53,919 INFO L93 Difference]: Finished difference Result 1490 states and 3189 transitions. [2022-03-15 21:36:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 21:36:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 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 26 [2022-03-15 21:36:53,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:53,921 INFO L225 Difference]: With dead ends: 1490 [2022-03-15 21:36:53,921 INFO L226 Difference]: Without dead ends: 1454 [2022-03-15 21:36:53,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3771 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2285, Invalid=11055, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 21:36:53,922 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 225 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:53,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 0 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:36:53,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-03-15 21:36:53,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 667. [2022-03-15 21:36:53,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 666 states have (on average 2.5645645645645647) internal successors, (1708), 666 states have internal predecessors, (1708), 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 21:36:53,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 1708 transitions. [2022-03-15 21:36:53,932 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 1708 transitions. Word has length 26 [2022-03-15 21:36:53,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:53,932 INFO L470 AbstractCegarLoop]: Abstraction has 667 states and 1708 transitions. [2022-03-15 21:36:53,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 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 21:36:53,932 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 1708 transitions. [2022-03-15 21:36:53,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:53,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:53,933 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:53,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-15 21:36:54,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:54,134 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:54,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash 2069035413, now seen corresponding path program 108 times [2022-03-15 21:36:54,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:54,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816519258] [2022-03-15 21:36:54,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:54,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 23 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:54,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:54,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816519258] [2022-03-15 21:36:54,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816519258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:54,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040232663] [2022-03-15 21:36:54,292 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:36:54,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:54,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:54,293 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:54,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-15 21:36:54,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:36:54,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:54,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:36:54,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:54,861 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:54,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:55,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040232663] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:55,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:55,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 55 [2022-03-15 21:36:55,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1423971957] [2022-03-15 21:36:55,601 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:55,602 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:55,605 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2022-03-15 21:36:55,605 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:55,814 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [180689#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 180690#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 180687#(< j1 M1), 180688#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:36:55,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:36:55,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:55,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:36:55,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=560, Invalid=2980, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:36:55,815 INFO L87 Difference]: Start difference. First operand 667 states and 1708 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 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 21:36:57,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:57,588 INFO L93 Difference]: Finished difference Result 1702 states and 3759 transitions. [2022-03-15 21:36:57,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 21:36:57,589 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 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 26 [2022-03-15 21:36:57,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:57,590 INFO L225 Difference]: With dead ends: 1702 [2022-03-15 21:36:57,590 INFO L226 Difference]: Without dead ends: 1696 [2022-03-15 21:36:57,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3415 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2451, Invalid=10431, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 21:36:57,591 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 172 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:57,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 0 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:57,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-03-15 21:36:57,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 834. [2022-03-15 21:36:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 2.6290516206482595) internal successors, (2190), 833 states have internal predecessors, (2190), 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 21:36:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2190 transitions. [2022-03-15 21:36:57,601 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2190 transitions. Word has length 26 [2022-03-15 21:36:57,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:57,601 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 2190 transitions. [2022-03-15 21:36:57,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 20 states have internal predecessors, (37), 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 21:36:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2190 transitions. [2022-03-15 21:36:57,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:36:57,602 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:57,602 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:57,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-15 21:36:57,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:57,802 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:57,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:57,802 INFO L85 PathProgramCache]: Analyzing trace with hash 752878109, now seen corresponding path program 109 times [2022-03-15 21:36:57,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:57,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618905234] [2022-03-15 21:36:57,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:57,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 24 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:57,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:57,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618905234] [2022-03-15 21:36:57,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618905234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:57,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552746266] [2022-03-15 21:36:57,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:36:57,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:57,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:57,970 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:36:57,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-15 21:36:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:57,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 21:36:57,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:58,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:59,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552746266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:59,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:59,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 56 [2022-03-15 21:36:59,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340858535] [2022-03-15 21:36:59,297 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:59,298 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:59,301 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 44 transitions. [2022-03-15 21:36:59,302 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:59,592 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [184377#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 184379#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 184376#(< j1 M1), 184380#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 184378#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:36:59,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:36:59,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:59,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:36:59,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:36:59,593 INFO L87 Difference]: Start difference. First operand 834 states and 2190 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 21:37:01,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:01,513 INFO L93 Difference]: Finished difference Result 1702 states and 3758 transitions. [2022-03-15 21:37:01,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 21:37:01,514 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 26 [2022-03-15 21:37:01,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:01,516 INFO L225 Difference]: With dead ends: 1702 [2022-03-15 21:37:01,517 INFO L226 Difference]: Without dead ends: 1694 [2022-03-15 21:37:01,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3781 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2718, Invalid=11562, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 21:37:01,518 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:01,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:01,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2022-03-15 21:37:01,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 834. [2022-03-15 21:37:01,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 2.623049219687875) internal successors, (2185), 833 states have internal predecessors, (2185), 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 21:37:01,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2185 transitions. [2022-03-15 21:37:01,532 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2185 transitions. Word has length 26 [2022-03-15 21:37:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:01,532 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 2185 transitions. [2022-03-15 21:37:01,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 22 states have internal predecessors, (40), 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 21:37:01,532 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2185 transitions. [2022-03-15 21:37:01,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:01,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:01,533 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:01,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-15 21:37:01,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-03-15 21:37:01,734 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:01,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:01,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1393292651, now seen corresponding path program 110 times [2022-03-15 21:37:01,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:01,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720356067] [2022-03-15 21:37:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:01,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 25 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:01,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:01,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720356067] [2022-03-15 21:37:01,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720356067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:01,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469663575] [2022-03-15 21:37:01,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:37:01,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:01,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:01,912 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:01,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-15 21:37:01,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:37:01,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:01,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:37:01,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:02,467 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:02,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:03,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469663575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:03,091 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:03,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 55 [2022-03-15 21:37:03,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1896339821] [2022-03-15 21:37:03,091 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:03,092 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:03,096 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 48 transitions. [2022-03-15 21:37:03,096 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:03,464 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [188077#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 188073#(< j1 M1), 187998#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 188075#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 188076#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 188074#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:37:03,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:37:03,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:03,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:37:03,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=3116, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:37:03,465 INFO L87 Difference]: Start difference. First operand 834 states and 2185 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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 21:37:05,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:05,412 INFO L93 Difference]: Finished difference Result 1592 states and 3542 transitions. [2022-03-15 21:37:05,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 21:37:05,412 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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 26 [2022-03-15 21:37:05,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:05,414 INFO L225 Difference]: With dead ends: 1592 [2022-03-15 21:37:05,414 INFO L226 Difference]: Without dead ends: 1582 [2022-03-15 21:37:05,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3689 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2478, Invalid=10862, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 21:37:05,415 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 184 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:05,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 0 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:05,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-03-15 21:37:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 826. [2022-03-15 21:37:05,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.6133333333333333) internal successors, (2156), 825 states have internal predecessors, (2156), 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 21:37:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2156 transitions. [2022-03-15 21:37:05,425 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2156 transitions. Word has length 26 [2022-03-15 21:37:05,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:05,425 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2156 transitions. [2022-03-15 21:37:05,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 24 states have internal predecessors, (43), 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 21:37:05,425 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2156 transitions. [2022-03-15 21:37:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:05,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:05,426 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:05,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:05,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-15 21:37:05,626 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:05,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:05,626 INFO L85 PathProgramCache]: Analyzing trace with hash 794890525, now seen corresponding path program 111 times [2022-03-15 21:37:05,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:05,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443865262] [2022-03-15 21:37:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:05,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:05,828 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 26 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:05,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:05,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443865262] [2022-03-15 21:37:05,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443865262] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:05,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953089152] [2022-03-15 21:37:05,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:37:05,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:05,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:05,830 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:05,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-15 21:37:05,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:37:05,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:05,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:37:05,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:06,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:07,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953089152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:07,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:07,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 58 [2022-03-15 21:37:07,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [863012367] [2022-03-15 21:37:07,142 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:07,143 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:07,147 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 52 transitions. [2022-03-15 21:37:07,147 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:07,588 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [191644#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 191642#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 191646#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 191645#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 191641#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 191647#(< j1 M1), 191643#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:37:07,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:37:07,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:07,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:37:07,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=598, Invalid=3692, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:37:07,589 INFO L87 Difference]: Start difference. First operand 826 states and 2156 transitions. Second operand has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 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 21:37:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:09,306 INFO L93 Difference]: Finished difference Result 1394 states and 3160 transitions. [2022-03-15 21:37:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 21:37:09,307 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 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 26 [2022-03-15 21:37:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:09,309 INFO L225 Difference]: With dead ends: 1394 [2022-03-15 21:37:09,309 INFO L226 Difference]: Without dead ends: 1382 [2022-03-15 21:37:09,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3223 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2075, Invalid=9915, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 21:37:09,310 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 231 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:09,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 0 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:09,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2022-03-15 21:37:09,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 810. [2022-03-15 21:37:09,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 2.599505562422744) internal successors, (2103), 809 states have internal predecessors, (2103), 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 21:37:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2103 transitions. [2022-03-15 21:37:09,319 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2103 transitions. Word has length 26 [2022-03-15 21:37:09,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:09,319 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 2103 transitions. [2022-03-15 21:37:09,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 26 states have internal predecessors, (46), 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 21:37:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2103 transitions. [2022-03-15 21:37:09,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:09,320 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:09,320 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:09,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-15 21:37:09,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-15 21:37:09,520 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:09,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:09,521 INFO L85 PathProgramCache]: Analyzing trace with hash -90907755, now seen corresponding path program 112 times [2022-03-15 21:37:09,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:09,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272477689] [2022-03-15 21:37:09,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:09,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 27 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:09,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:09,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272477689] [2022-03-15 21:37:09,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272477689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:09,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807246297] [2022-03-15 21:37:09,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:37:09,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:09,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:09,738 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:09,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-15 21:37:09,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:37:09,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:09,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 21:37:09,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:10,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:11,031 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 21 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:11,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807246297] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:11,031 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:11,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 59 [2022-03-15 21:37:11,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1980125269] [2022-03-15 21:37:11,031 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:11,032 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:11,036 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 56 transitions. [2022-03-15 21:37:11,037 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:11,545 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [194967#(< j1 M1), 194965#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 194963#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 194961#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 194966#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 194964#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 194962#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 194960#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:37:11,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:37:11,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:11,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:37:11,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=3916, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:37:11,546 INFO L87 Difference]: Start difference. First operand 810 states and 2103 transitions. Second operand has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 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 21:37:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:12,740 INFO L93 Difference]: Finished difference Result 1109 states and 2581 transitions. [2022-03-15 21:37:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:37:12,740 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 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 26 [2022-03-15 21:37:12,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:12,742 INFO L225 Difference]: With dead ends: 1109 [2022-03-15 21:37:12,742 INFO L226 Difference]: Without dead ends: 1095 [2022-03-15 21:37:12,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2638 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1484, Invalid=7828, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 21:37:12,743 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 226 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:12,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 0 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:12,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1095 states. [2022-03-15 21:37:12,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1095 to 730. [2022-03-15 21:37:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 2.5528120713305897) internal successors, (1861), 729 states have internal predecessors, (1861), 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 21:37:12,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 1861 transitions. [2022-03-15 21:37:12,751 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 1861 transitions. Word has length 26 [2022-03-15 21:37:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:12,751 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 1861 transitions. [2022-03-15 21:37:12,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 28 states have internal predecessors, (49), 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 21:37:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 1861 transitions. [2022-03-15 21:37:12,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:12,751 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:12,751 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:12,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:12,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-15 21:37:12,952 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:12,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:12,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1780850659, now seen corresponding path program 113 times [2022-03-15 21:37:12,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:12,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022446878] [2022-03-15 21:37:12,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:12,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:13,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:13,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022446878] [2022-03-15 21:37:13,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022446878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:13,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081130232] [2022-03-15 21:37:13,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:37:13,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:13,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:13,167 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:13,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-15 21:37:13,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:37:13,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:13,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 21:37:13,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:13,656 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:13,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:14,367 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:14,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081130232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:14,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:14,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 58 [2022-03-15 21:37:14,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2107490817] [2022-03-15 21:37:14,367 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:14,368 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:14,373 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 60 transitions. [2022-03-15 21:37:14,373 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:14,939 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [197811#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 197804#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 197810#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 197805#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 197806#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 197812#(< j1 M1), 197809#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 197808#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 197807#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:37:14,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:37:14,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:14,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:37:14,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=3890, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:37:14,940 INFO L87 Difference]: Start difference. First operand 730 states and 1861 transitions. Second operand has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 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 21:37:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:16,425 INFO L93 Difference]: Finished difference Result 1051 states and 2418 transitions. [2022-03-15 21:37:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 21:37:16,425 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 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 26 [2022-03-15 21:37:16,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:16,426 INFO L225 Difference]: With dead ends: 1051 [2022-03-15 21:37:16,426 INFO L226 Difference]: Without dead ends: 1035 [2022-03-15 21:37:16,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3339 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1901, Invalid=9441, Unknown=0, NotChecked=0, Total=11342 [2022-03-15 21:37:16,427 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 254 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:16,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 0 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:16,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-03-15 21:37:16,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 669. [2022-03-15 21:37:16,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 2.562874251497006) internal successors, (1712), 668 states have internal predecessors, (1712), 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 21:37:16,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 1712 transitions. [2022-03-15 21:37:16,434 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 1712 transitions. Word has length 26 [2022-03-15 21:37:16,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:16,434 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 1712 transitions. [2022-03-15 21:37:16,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6774193548387097) internal successors, (52), 30 states have internal predecessors, (52), 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 21:37:16,434 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 1712 transitions. [2022-03-15 21:37:16,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:16,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:16,435 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:16,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-15 21:37:16,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:16,635 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:16,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:16,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1121666259, now seen corresponding path program 114 times [2022-03-15 21:37:16,636 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:16,636 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818616842] [2022-03-15 21:37:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:16,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:16,766 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 29 proven. 60 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:16,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:16,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818616842] [2022-03-15 21:37:16,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818616842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:16,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479989248] [2022-03-15 21:37:16,767 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:37:16,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:16,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:16,768 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:16,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-15 21:37:16,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:37:16,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:16,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 21:37:16,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:17,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:17,830 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:17,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479989248] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:17,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:17,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20, 20] total 51 [2022-03-15 21:37:17,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1409166773] [2022-03-15 21:37:17,831 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:17,832 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:17,835 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2022-03-15 21:37:17,835 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:17,907 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [200482#(< j1 M1), 200483#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:37:17,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:37:17,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:17,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:37:17,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=2332, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:37:17,907 INFO L87 Difference]: Start difference. First operand 669 states and 1712 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 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 21:37:18,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:18,388 INFO L93 Difference]: Finished difference Result 1370 states and 3082 transitions. [2022-03-15 21:37:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:37:18,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 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 26 [2022-03-15 21:37:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:18,390 INFO L225 Difference]: With dead ends: 1370 [2022-03-15 21:37:18,390 INFO L226 Difference]: Without dead ends: 1366 [2022-03-15 21:37:18,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1089, Invalid=4611, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:37:18,390 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 140 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:18,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 0 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1366 states. [2022-03-15 21:37:18,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1366 to 817. [2022-03-15 21:37:18,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.611519607843137) internal successors, (2131), 816 states have internal predecessors, (2131), 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 21:37:18,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2131 transitions. [2022-03-15 21:37:18,400 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2131 transitions. Word has length 26 [2022-03-15 21:37:18,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:18,400 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 2131 transitions. [2022-03-15 21:37:18,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 16 states have internal predecessors, (32), 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 21:37:18,400 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2131 transitions. [2022-03-15 21:37:18,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:18,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:18,400 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:18,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:18,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:18,601 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1995406939, now seen corresponding path program 115 times [2022-03-15 21:37:18,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:18,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029191981] [2022-03-15 21:37:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:18,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:18,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 30 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:18,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:18,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029191981] [2022-03-15 21:37:18,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029191981] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:18,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891567472] [2022-03-15 21:37:18,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:37:18,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:18,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:18,748 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:18,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-15 21:37:18,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:18,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:37:18,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:19,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:19,851 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:19,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891567472] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:19,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:19,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 52 [2022-03-15 21:37:19,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1877321060] [2022-03-15 21:37:19,851 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:19,852 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:19,856 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 38 transitions. [2022-03-15 21:37:19,856 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:19,998 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [203736#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 203735#(< j1 M1), 203737#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:37:19,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:37:19,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:19,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:37:19,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=2566, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:37:19,999 INFO L87 Difference]: Start difference. First operand 817 states and 2131 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 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 21:37:20,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:20,636 INFO L93 Difference]: Finished difference Result 1457 states and 3264 transitions. [2022-03-15 21:37:20,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:37:20,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 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 26 [2022-03-15 21:37:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:20,638 INFO L225 Difference]: With dead ends: 1457 [2022-03-15 21:37:20,638 INFO L226 Difference]: Without dead ends: 1451 [2022-03-15 21:37:20,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1252, Invalid=5720, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 21:37:20,638 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 181 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:20,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 0 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:20,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-03-15 21:37:20,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 826. [2022-03-15 21:37:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.610909090909091) internal successors, (2154), 825 states have internal predecessors, (2154), 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 21:37:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2154 transitions. [2022-03-15 21:37:20,648 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2154 transitions. Word has length 26 [2022-03-15 21:37:20,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:20,648 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2154 transitions. [2022-03-15 21:37:20,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 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 21:37:20,649 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2154 transitions. [2022-03-15 21:37:20,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:20,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:20,649 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:20,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-15 21:37:20,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-03-15 21:37:20,850 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:20,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:20,850 INFO L85 PathProgramCache]: Analyzing trace with hash 983403053, now seen corresponding path program 116 times [2022-03-15 21:37:20,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:20,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945809244] [2022-03-15 21:37:20,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:20,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:21,000 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 31 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:21,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:21,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945809244] [2022-03-15 21:37:21,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945809244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:21,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776387996] [2022-03-15 21:37:21,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:37:21,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:21,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:21,001 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:21,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-15 21:37:21,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:37:21,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:21,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:37:21,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:21,567 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:21,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:22,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776387996] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:22,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:22,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 53 [2022-03-15 21:37:22,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [705127472] [2022-03-15 21:37:22,136 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:22,137 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:22,141 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 42 transitions. [2022-03-15 21:37:22,141 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:22,365 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [207032#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 207109#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 207107#(< j1 M1), 207108#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:37:22,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:37:22,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:22,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:37:22,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=2694, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:37:22,366 INFO L87 Difference]: Start difference. First operand 826 states and 2154 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 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 21:37:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:23,117 INFO L93 Difference]: Finished difference Result 1465 states and 3284 transitions. [2022-03-15 21:37:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:37:23,117 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 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 26 [2022-03-15 21:37:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:23,119 INFO L225 Difference]: With dead ends: 1465 [2022-03-15 21:37:23,119 INFO L226 Difference]: Without dead ends: 1457 [2022-03-15 21:37:23,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2290 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1309, Invalid=6173, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:37:23,120 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 182 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:23,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 0 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-03-15 21:37:23,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 829. [2022-03-15 21:37:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 2.607487922705314) internal successors, (2159), 828 states have internal predecessors, (2159), 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 21:37:23,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 2159 transitions. [2022-03-15 21:37:23,129 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 2159 transitions. Word has length 26 [2022-03-15 21:37:23,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:23,129 INFO L470 AbstractCegarLoop]: Abstraction has 829 states and 2159 transitions. [2022-03-15 21:37:23,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 20 states have internal predecessors, (38), 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 21:37:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 2159 transitions. [2022-03-15 21:37:23,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:23,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:23,130 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:23,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-15 21:37:23,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:23,330 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:23,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:23,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1162767707, now seen corresponding path program 117 times [2022-03-15 21:37:23,331 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:23,331 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894126092] [2022-03-15 21:37:23,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:23,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:23,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:23,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894126092] [2022-03-15 21:37:23,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894126092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:23,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220060824] [2022-03-15 21:37:23,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:37:23,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:23,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:23,501 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:23,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-15 21:37:23,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:37:23,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:23,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:37:23,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:24,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:24,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220060824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:24,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:24,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 56 [2022-03-15 21:37:24,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [457527775] [2022-03-15 21:37:24,801 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:24,802 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:24,806 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 46 transitions. [2022-03-15 21:37:24,806 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:25,131 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [210503#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 210504#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 210502#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 210501#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 210500#(< j1 M1)] [2022-03-15 21:37:25,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:37:25,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:25,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:37:25,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=3237, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:37:25,132 INFO L87 Difference]: Start difference. First operand 829 states and 2159 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:25,970 INFO L93 Difference]: Finished difference Result 1417 states and 3192 transitions. [2022-03-15 21:37:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:37:25,970 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 21:37:25,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:25,972 INFO L225 Difference]: With dead ends: 1417 [2022-03-15 21:37:25,972 INFO L226 Difference]: Without dead ends: 1407 [2022-03-15 21:37:25,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1430, Invalid=6942, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 21:37:25,973 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 199 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:25,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 0 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:25,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2022-03-15 21:37:25,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 826. [2022-03-15 21:37:25,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 825 states have (on average 2.601212121212121) internal successors, (2146), 825 states have internal predecessors, (2146), 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 21:37:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 2146 transitions. [2022-03-15 21:37:25,982 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 2146 transitions. Word has length 26 [2022-03-15 21:37:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:25,982 INFO L470 AbstractCegarLoop]: Abstraction has 826 states and 2146 transitions. [2022-03-15 21:37:25,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 2146 transitions. [2022-03-15 21:37:25,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:25,983 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:25,983 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:25,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:26,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:26,183 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:26,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:26,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1025415469, now seen corresponding path program 118 times [2022-03-15 21:37:26,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:26,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253192507] [2022-03-15 21:37:26,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:26,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:26,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:26,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:26,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253192507] [2022-03-15 21:37:26,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253192507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:26,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951056642] [2022-03-15 21:37:26,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:37:26,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:26,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:26,357 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:26,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-15 21:37:26,388 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:37:26,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:26,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:37:26,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:26,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:27,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951056642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:27,473 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:27,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 55 [2022-03-15 21:37:27,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1691003872] [2022-03-15 21:37:27,473 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:27,475 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:27,478 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 50 transitions. [2022-03-15 21:37:27,478 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:27,843 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [213843#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 213841#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 213844#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 213842#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 213845#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 213840#(< j1 M1)] [2022-03-15 21:37:27,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:37:27,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:27,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:37:27,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=3244, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:37:27,844 INFO L87 Difference]: Start difference. First operand 826 states and 2146 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 21:37:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:28,652 INFO L93 Difference]: Finished difference Result 1319 states and 3000 transitions. [2022-03-15 21:37:28,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:37:28,652 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 26 [2022-03-15 21:37:28,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:28,654 INFO L225 Difference]: With dead ends: 1319 [2022-03-15 21:37:28,654 INFO L226 Difference]: Without dead ends: 1307 [2022-03-15 21:37:28,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2595 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1321, Invalid=6689, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 21:37:28,655 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 216 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:28,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 0 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1307 states. [2022-03-15 21:37:28,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1307 to 817. [2022-03-15 21:37:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.5919117647058822) internal successors, (2115), 816 states have internal predecessors, (2115), 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 21:37:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2115 transitions. [2022-03-15 21:37:28,665 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2115 transitions. Word has length 26 [2022-03-15 21:37:28,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:28,665 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 2115 transitions. [2022-03-15 21:37:28,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 21:37:28,665 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2115 transitions. [2022-03-15 21:37:28,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:28,666 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:28,666 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:28,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2022-03-15 21:37:28,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-03-15 21:37:28,866 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash 139617189, now seen corresponding path program 119 times [2022-03-15 21:37:28,867 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:28,867 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422150818] [2022-03-15 21:37:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:28,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:29,046 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 34 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:29,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:29,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422150818] [2022-03-15 21:37:29,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422150818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:29,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673798356] [2022-03-15 21:37:29,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:37:29,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:29,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:29,047 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:29,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-15 21:37:29,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:37:29,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:29,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:37:29,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:29,510 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:29,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:30,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673798356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:30,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:30,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 56 [2022-03-15 21:37:30,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [272839966] [2022-03-15 21:37:30,151 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:30,152 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:30,156 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 54 transitions. [2022-03-15 21:37:30,156 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:30,609 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [217067#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 217062#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 217065#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 217063#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 217066#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 217064#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 217068#(< j1 M1)] [2022-03-15 21:37:30,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:37:30,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:30,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:37:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=3462, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:37:30,610 INFO L87 Difference]: Start difference. First operand 817 states and 2115 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 21:37:31,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:31,480 INFO L93 Difference]: Finished difference Result 1177 states and 2720 transitions. [2022-03-15 21:37:31,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:37:31,480 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 26 [2022-03-15 21:37:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:31,482 INFO L225 Difference]: With dead ends: 1177 [2022-03-15 21:37:31,482 INFO L226 Difference]: Without dead ends: 1163 [2022-03-15 21:37:31,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2542 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1211, Invalid=6445, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 21:37:31,483 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 220 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:31,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 0 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-03-15 21:37:31,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 802. [2022-03-15 21:37:31,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 2.579275905118602) internal successors, (2066), 801 states have internal predecessors, (2066), 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 21:37:31,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2066 transitions. [2022-03-15 21:37:31,492 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2066 transitions. Word has length 26 [2022-03-15 21:37:31,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:31,492 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 2066 transitions. [2022-03-15 21:37:31,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 21:37:31,492 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2066 transitions. [2022-03-15 21:37:31,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:31,493 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:31,493 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:31,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:31,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:31,693 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:31,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:31,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1550325715, now seen corresponding path program 120 times [2022-03-15 21:37:31,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:31,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452340058] [2022-03-15 21:37:31,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:31,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:31,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 35 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:31,908 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:31,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452340058] [2022-03-15 21:37:31,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452340058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:31,908 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458952691] [2022-03-15 21:37:31,908 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:37:31,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:31,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:31,909 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:31,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-15 21:37:31,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:37:31,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:31,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:37:31,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:32,417 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:32,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:33,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458952691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:33,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:33,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 57 [2022-03-15 21:37:33,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1231842412] [2022-03-15 21:37:33,068 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:33,069 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:33,074 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 58 transitions. [2022-03-15 21:37:33,074 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:33,634 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [220107#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 220113#(< j1 M1), 220110#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 220109#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 220108#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 220112#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 220106#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 220111#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2)))] [2022-03-15 21:37:33,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:37:33,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:33,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:37:33,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=3677, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:37:33,635 INFO L87 Difference]: Start difference. First operand 802 states and 2066 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 21:37:34,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:34,405 INFO L93 Difference]: Finished difference Result 982 states and 2316 transitions. [2022-03-15 21:37:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:37:34,405 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 26 [2022-03-15 21:37:34,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:34,410 INFO L225 Difference]: With dead ends: 982 [2022-03-15 21:37:34,410 INFO L226 Difference]: Without dead ends: 966 [2022-03-15 21:37:34,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1034, Invalid=5938, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 21:37:34,410 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 192 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:34,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 0 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:34,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2022-03-15 21:37:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 733. [2022-03-15 21:37:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 733 states, 732 states have (on average 2.540983606557377) internal successors, (1860), 732 states have internal predecessors, (1860), 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 21:37:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 733 states to 733 states and 1860 transitions. [2022-03-15 21:37:34,417 INFO L78 Accepts]: Start accepts. Automaton has 733 states and 1860 transitions. Word has length 26 [2022-03-15 21:37:34,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:34,417 INFO L470 AbstractCegarLoop]: Abstraction has 733 states and 1860 transitions. [2022-03-15 21:37:34,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 21:37:34,418 INFO L276 IsEmpty]: Start isEmpty. Operand 733 states and 1860 transitions. [2022-03-15 21:37:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:37:34,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:34,418 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:34,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-15 21:37:34,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:34,619 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:34,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:34,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1896019109, now seen corresponding path program 121 times [2022-03-15 21:37:34,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:34,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036767188] [2022-03-15 21:37:34,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:34,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:34,821 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:34,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:34,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036767188] [2022-03-15 21:37:34,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036767188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:34,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392537830] [2022-03-15 21:37:34,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:37:34,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:34,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:34,823 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:34,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-15 21:37:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:34,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:37:34,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:35,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:35,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392537830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:35,953 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:35,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 58 [2022-03-15 21:37:35,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [249536333] [2022-03-15 21:37:35,953 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:35,954 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:35,959 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 62 transitions. [2022-03-15 21:37:35,959 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:36,528 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [222810#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 222809#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 222813#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 222811#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 222812#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 222815#(or (<= (+ 9 j2) M2) (<= counter 7) (<= M2 (+ 7 j2))), 222808#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 222814#(< j1 M1), 222807#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:37:36,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:37:36,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:36,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:37:36,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=3862, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:37:36,529 INFO L87 Difference]: Start difference. First operand 733 states and 1860 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 21:37:37,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:37,590 INFO L93 Difference]: Finished difference Result 957 states and 2205 transitions. [2022-03-15 21:37:37,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:37:37,590 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 26 [2022-03-15 21:37:37,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:37,591 INFO L225 Difference]: With dead ends: 957 [2022-03-15 21:37:37,591 INFO L226 Difference]: Without dead ends: 923 [2022-03-15 21:37:37,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2915 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1537, Invalid=7583, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 21:37:37,592 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 197 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:37,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 0 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:37,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-03-15 21:37:37,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 751. [2022-03-15 21:37:37,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 2.54) internal successors, (1905), 750 states have internal predecessors, (1905), 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 21:37:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 1905 transitions. [2022-03-15 21:37:37,598 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 1905 transitions. Word has length 26 [2022-03-15 21:37:37,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:37,598 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 1905 transitions. [2022-03-15 21:37:37,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 21:37:37,599 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 1905 transitions. [2022-03-15 21:37:37,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:37:37,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:37,599 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:37,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-15 21:37:37,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-15 21:37:37,800 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:37,800 INFO L85 PathProgramCache]: Analyzing trace with hash 252850082, now seen corresponding path program 122 times [2022-03-15 21:37:37,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:37,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170442564] [2022-03-15 21:37:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:37,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:37,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:38,006 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:38,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170442564] [2022-03-15 21:37:38,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170442564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:38,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592195544] [2022-03-15 21:37:38,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:37:38,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:38,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:38,007 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:38,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-15 21:37:38,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:37:38,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:38,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 21:37:38,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:38,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 45 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:39,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592195544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:39,142 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:39,142 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 61 [2022-03-15 21:37:39,142 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [623798118] [2022-03-15 21:37:39,142 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:39,144 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:39,150 INFO L252 McrAutomatonBuilder]: Finished intersection with 59 states and 89 transitions. [2022-03-15 21:37:39,150 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:40,001 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 21 new interpolants: [225563#(or (<= M1 (+ 3 j1)) (<= (+ j2 10) M2) (< (+ j1 4) M1)), 225564#(or (< (+ 5 j1) M1) (<= (+ j2 10) M2) (<= M1 (+ j1 4))), 225553#(or (< j1 M1) (<= (+ j2 4) M2)), 225559#(or (< j1 M1) (<= (+ j2 10) M2)), 225549#(< j1 M1), 225566#(or (< (+ 7 j1) M1) (<= (+ j2 10) M2) (<= M1 (+ 6 j1))), 225556#(or (<= (+ 7 j2) M2) (< j1 M1)), 225560#(or (<= (+ j2 10) M2) (< (+ j1 1) M1) (<= M1 j1)), 225554#(or (< j1 M1) (<= (+ 5 j2) M2)), 225557#(or (< j1 M1) (<= (+ j2 8) M2)), 225567#(or (< (+ j1 8) M1) (<= (+ j2 10) M2) (<= M1 (+ 7 j1))), 225550#(or (< j1 M1) (<= (+ j2 1) M2)), 225555#(or (<= (+ 6 j2) M2) (< j1 M1)), 225561#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ j2 10) M2)), 225565#(or (<= (+ j2 10) M2) (<= M1 (+ 5 j1)) (< (+ 6 j1) M1)), 225551#(or (< j1 M1) (<= (+ 2 j2) M2)), 225558#(or (<= (+ 9 j2) M2) (< j1 M1)), 225568#(or (< (+ 9 j1) M1) (<= (+ j2 10) M2) (<= M1 (+ j1 8))), 225562#(or (<= M1 (+ 2 j1)) (< (+ 3 j1) M1) (<= (+ j2 10) M2)), 225552#(or (< j1 M1) (<= (+ 3 j2) M2)), 225569#(or (< (+ j1 10) M1) (<= (+ j2 10) M2) (<= M1 (+ 9 j1)))] [2022-03-15 21:37:40,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-15 21:37:40,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:40,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-15 21:37:40,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1188, Invalid=5618, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:37:40,002 INFO L87 Difference]: Start difference. First operand 751 states and 1905 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 43 states have internal predecessors, (79), 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 21:37:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:41,118 INFO L93 Difference]: Finished difference Result 1064 states and 2430 transitions. [2022-03-15 21:37:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:37:41,118 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 43 states have internal predecessors, (79), 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 27 [2022-03-15 21:37:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:41,120 INFO L225 Difference]: With dead ends: 1064 [2022-03-15 21:37:41,120 INFO L226 Difference]: Without dead ends: 1000 [2022-03-15 21:37:41,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5184 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3151, Invalid=11369, Unknown=0, NotChecked=0, Total=14520 [2022-03-15 21:37:41,120 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 213 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:41,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 0 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:41,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-03-15 21:37:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 747. [2022-03-15 21:37:41,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 2.532171581769437) internal successors, (1889), 746 states have internal predecessors, (1889), 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 21:37:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1889 transitions. [2022-03-15 21:37:41,128 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1889 transitions. Word has length 27 [2022-03-15 21:37:41,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:41,128 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1889 transitions. [2022-03-15 21:37:41,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 43 states have internal predecessors, (79), 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 21:37:41,128 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1889 transitions. [2022-03-15 21:37:41,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:37:41,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:41,129 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:41,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:41,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:41,329 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1353913370, now seen corresponding path program 123 times [2022-03-15 21:37:41,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:41,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058062017] [2022-03-15 21:37:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:41,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:41,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:41,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:41,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058062017] [2022-03-15 21:37:41,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058062017] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:41,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913486337] [2022-03-15 21:37:41,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:37:41,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:41,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:41,447 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:41,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-15 21:37:41,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:37:41,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:41,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:37:41,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 46 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:41,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:42,623 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:42,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913486337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:42,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:42,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 21, 21] total 51 [2022-03-15 21:37:42,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1515765119] [2022-03-15 21:37:42,623 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:42,624 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:42,629 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 51 transitions. [2022-03-15 21:37:42,629 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:42,978 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [228420#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 7 j1))) (or (<= M1 (+ 7 j1)) (<= (+ j2 1) j1))), 228415#(and (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M1 (+ 2 j1)) (<= (+ 6 j2) j1))), 228421#(and (or (<= j2 j1) (<= M1 (+ j1 8))) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 8)))), 228412#(< j2 M2), 228418#(and (or (<= (+ 3 j2) j1) (<= M1 (+ 5 j1))) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 5 j1)))), 228413#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= (+ j2 8) j1) (<= M1 j1))), 228414#(and (or (<= (+ 7 j2) j1) (<= M1 (+ j1 1))) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 228419#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 6 j1))) (or (<= (+ 2 j2) j1) (<= M1 (+ 6 j1)))), 228417#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 4))) (or (<= (+ j2 4) j1) (<= M1 (+ j1 4)))), 228416#(and (or (<= M1 (+ 3 j1)) (<= (+ 5 j2) j1)) (or (<= M1 (+ 3 j1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 21:37:42,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:37:42,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:42,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:37:42,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=2947, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:37:42,979 INFO L87 Difference]: Start difference. First operand 747 states and 1889 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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 21:37:43,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:43,435 INFO L93 Difference]: Finished difference Result 851 states and 2072 transitions. [2022-03-15 21:37:43,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:37:43,436 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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 27 [2022-03-15 21:37:43,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:43,437 INFO L225 Difference]: With dead ends: 851 [2022-03-15 21:37:43,437 INFO L226 Difference]: Without dead ends: 850 [2022-03-15 21:37:43,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1973, Invalid=6037, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 21:37:43,437 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:43,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:37:43,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-03-15 21:37:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 747. [2022-03-15 21:37:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 2.5308310991957104) internal successors, (1888), 746 states have internal predecessors, (1888), 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 21:37:43,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1888 transitions. [2022-03-15 21:37:43,444 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1888 transitions. Word has length 27 [2022-03-15 21:37:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:43,444 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1888 transitions. [2022-03-15 21:37:43,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 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 21:37:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1888 transitions. [2022-03-15 21:37:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:37:43,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:43,445 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:43,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-15 21:37:43,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-15 21:37:43,645 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:43,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:43,646 INFO L85 PathProgramCache]: Analyzing trace with hash -751724453, now seen corresponding path program 124 times [2022-03-15 21:37:43,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:43,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351049929] [2022-03-15 21:37:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:43,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:43,775 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:43,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351049929] [2022-03-15 21:37:43,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351049929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:43,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469069038] [2022-03-15 21:37:43,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:37:43,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:43,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:43,776 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:43,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-15 21:37:43,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:37:43,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:43,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 21:37:43,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:43,882 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:43,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 55 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:44,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469069038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:44,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:44,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 21] total 31 [2022-03-15 21:37:44,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1799913972] [2022-03-15 21:37:44,286 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:44,287 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:44,294 INFO L252 McrAutomatonBuilder]: Finished intersection with 62 states and 94 transitions. [2022-03-15 21:37:44,294 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:44,769 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:37:44,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:37:44,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:44,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:37:44,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:37:44,770 INFO L87 Difference]: Start difference. First operand 747 states and 1888 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 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 21:37:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:45,083 INFO L93 Difference]: Finished difference Result 1072 states and 2570 transitions. [2022-03-15 21:37:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:37:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 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 28 [2022-03-15 21:37:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:45,084 INFO L225 Difference]: With dead ends: 1072 [2022-03-15 21:37:45,084 INFO L226 Difference]: Without dead ends: 1046 [2022-03-15 21:37:45,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:37:45,085 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:45,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-03-15 21:37:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 878. [2022-03-15 21:37:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 2.5678449258836946) internal successors, (2252), 877 states have internal predecessors, (2252), 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 21:37:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2252 transitions. [2022-03-15 21:37:45,093 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2252 transitions. Word has length 28 [2022-03-15 21:37:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:45,093 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 2252 transitions. [2022-03-15 21:37:45,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 13 states have internal predecessors, (58), 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 21:37:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2252 transitions. [2022-03-15 21:37:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:37:45,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:45,094 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:45,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-15 21:37:45,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-15 21:37:45,310 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:45,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:45,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1120903047, now seen corresponding path program 125 times [2022-03-15 21:37:45,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:45,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282356413] [2022-03-15 21:37:45,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:45,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:45,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:45,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282356413] [2022-03-15 21:37:45,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282356413] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:45,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687992030] [2022-03-15 21:37:45,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:37:45,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:45,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:45,544 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:45,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-15 21:37:45,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:37:45,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:45,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-15 21:37:45,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:46,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:49,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687992030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:49,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:49,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 56 [2022-03-15 21:37:49,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1192903500] [2022-03-15 21:37:49,880 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:49,891 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:49,896 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 52 transitions. [2022-03-15 21:37:49,896 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:50,626 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [234067#(and (or (not (< j1 M1)) (<= counter 8)) (or (not (< j1 M1)) (<= 8 counter)) (or (not (< j1 M1)) (<= (+ j2 8) j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 234065#(< j1 M1), 234066#(or (< (+ j1 1) M1) (<= M1 j1)), 234071#(and (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter 4) (not (< (+ j1 4) M1))) (or (not (< (+ j1 4) M1)) (<= (+ j2 4) j1)) (or (not (< (+ j1 4) M1)) (<= 4 counter))), 234069#(and (or (not (< (+ 2 j1) M1)) (<= counter 6)) (or (<= (+ 6 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 6 counter) (not (< (+ 2 j1) M1)))), 234070#(and (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= counter 5)) (or (not (< (+ 3 j1) M1)) (<= 5 counter)) (or (not (< (+ 3 j1) M1)) (<= (+ 5 j2) j1))), 234074#(and (or (not (< (+ 7 j1) M1)) (<= 1 counter)) (or (not (< (+ 7 j1) M1)) (<= counter 1)) (or (not (< (+ 7 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 7 j1) M1)) (= (+ (* (- 1) M1) M2) 0))), 234073#(and (or (<= 2 counter) (not (< (+ 6 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ 6 j1) M1))) (or (<= counter 2) (not (< (+ 6 j1) M1)))), 234068#(and (or (not (< (+ j1 1) M1)) (<= 7 counter)) (or (<= counter 7) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= (+ 7 j2) j1) (not (< (+ j1 1) M1)))), 234075#(and (or (not (< (+ j1 8) M1)) (<= 0 counter)) (or (<= j2 j1) (not (< (+ j1 8) M1))) (or (<= counter 0) (not (< (+ j1 8) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 8) M1)))), 234072#(and (or (not (< (+ 5 j1) M1)) (<= 3 counter)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= counter 3)) (or (not (< (+ 5 j1) M1)) (<= (+ 3 j2) j1)))] [2022-03-15 21:37:50,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:37:50,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:50,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:37:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=890, Invalid=3666, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:37:50,627 INFO L87 Difference]: Start difference. First operand 878 states and 2252 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 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 21:37:53,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:53,510 INFO L93 Difference]: Finished difference Result 1480 states and 3366 transitions. [2022-03-15 21:37:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:37:53,511 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 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 28 [2022-03-15 21:37:53,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:53,512 INFO L225 Difference]: With dead ends: 1480 [2022-03-15 21:37:53,512 INFO L226 Difference]: Without dead ends: 1477 [2022-03-15 21:37:53,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2013, Invalid=8087, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 21:37:53,513 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 220 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:53,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 0 Invalid, 1644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:37:53,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2022-03-15 21:37:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 870. [2022-03-15 21:37:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 2.575373993095512) internal successors, (2238), 869 states have internal predecessors, (2238), 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 21:37:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2238 transitions. [2022-03-15 21:37:53,523 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2238 transitions. Word has length 28 [2022-03-15 21:37:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:53,523 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 2238 transitions. [2022-03-15 21:37:53,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 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 21:37:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2238 transitions. [2022-03-15 21:37:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:37:53,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:53,524 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:53,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-15 21:37:53,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-15 21:37:53,726 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:53,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:53,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1200817545, now seen corresponding path program 126 times [2022-03-15 21:37:53,727 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:53,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336695000] [2022-03-15 21:37:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:53,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:53,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:53,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:53,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336695000] [2022-03-15 21:37:53,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336695000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:53,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975809836] [2022-03-15 21:37:53,969 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:37:53,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:53,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:53,970 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:37:53,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-15 21:37:53,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:37:53,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:54,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:37:54,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:54,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:57,566 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:57,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975809836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:57,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:57,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 57 [2022-03-15 21:37:57,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [16759616] [2022-03-15 21:37:57,567 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:57,568 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:57,573 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 52 transitions. [2022-03-15 21:37:57,573 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:58,223 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [237590#(and (or (not (< (+ 7 j1) M1)) (<= counter 0)) (or (not (< (+ 7 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 7 j1) M1)) (<= j2 j1)) (or (not (< (+ 7 j1) M1)) (<= 0 counter))), 237582#(and (or (not (< j1 M1)) (<= counter 7)) (or (<= (+ 7 j2) j1) (not (< j1 M1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 7 counter))), 237589#(and (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= counter 1) (not (< (+ 6 j1) M1))) (or (<= 1 counter) (not (< (+ 6 j1) M1))) (or (not (< (+ 6 j1) M1)) (<= (+ j2 1) j1))), 237585#(and (or (<= 5 counter) (not (< (+ 2 j1) M1))) (or (<= counter 5) (not (< (+ 2 j1) M1))) (or (<= (+ 5 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 237583#(and (or (not (< (+ j1 1) M1)) (<= counter 6)) (or (<= (+ 6 j2) j1) (not (< (+ j1 1) M1))) (or (<= 6 counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 237591#(< j1 M1), 237584#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 237588#(and (or (not (< (+ 5 j1) M1)) (<= counter 2)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ 5 j1) M1)) (<= 2 counter))), 237586#(and (or (not (< (+ 3 j1) M1)) (<= (+ j2 4) j1)) (or (<= counter 4) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= 4 counter))), 237587#(and (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 3 counter)) (or (not (< (+ j1 4) M1)) (<= counter 3)) (or (not (< (+ j1 4) M1)) (<= (+ 3 j2) j1)))] [2022-03-15 21:37:58,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:37:58,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:58,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:37:58,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=3729, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:37:58,223 INFO L87 Difference]: Start difference. First operand 870 states and 2238 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 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 21:38:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:03,776 INFO L93 Difference]: Finished difference Result 2307 states and 4852 transitions. [2022-03-15 21:38:03,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-15 21:38:03,777 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 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 28 [2022-03-15 21:38:03,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:03,780 INFO L225 Difference]: With dead ends: 2307 [2022-03-15 21:38:03,780 INFO L226 Difference]: Without dead ends: 2303 [2022-03-15 21:38:03,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3953 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=3630, Invalid=16392, Unknown=0, NotChecked=0, Total=20022 [2022-03-15 21:38:03,781 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 357 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:03,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 0 Invalid, 1704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:38:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2303 states. [2022-03-15 21:38:03,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2303 to 862. [2022-03-15 21:38:03,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.5795586527293843) internal successors, (2221), 861 states have internal predecessors, (2221), 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 21:38:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2221 transitions. [2022-03-15 21:38:03,802 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2221 transitions. Word has length 28 [2022-03-15 21:38:03,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:03,803 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2221 transitions. [2022-03-15 21:38:03,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 26 states have internal predecessors, (50), 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 21:38:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2221 transitions. [2022-03-15 21:38:03,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:38:03,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:03,803 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:03,820 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-15 21:38:04,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:04,005 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:04,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:04,005 INFO L85 PathProgramCache]: Analyzing trace with hash 992351097, now seen corresponding path program 127 times [2022-03-15 21:38:04,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:04,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260117889] [2022-03-15 21:38:04,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:04,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 3 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:04,237 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:04,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260117889] [2022-03-15 21:38:04,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260117889] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:04,237 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358352813] [2022-03-15 21:38:04,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:38:04,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:04,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:04,238 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:04,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-15 21:38:04,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:38:04,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:04,866 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 3 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:04,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 3 proven. 107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:07,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358352813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:07,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:07,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 60 [2022-03-15 21:38:07,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [942167104] [2022-03-15 21:38:07,386 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:07,387 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:07,392 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 54 transitions. [2022-03-15 21:38:07,392 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:08,103 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [241997#(and (or (<= (+ j2 4) j1) (not (< (+ 2 j1) M1))) (or (<= counter 4) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 4 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 241995#(and (or (not (< j1 M1)) (<= (+ 6 j2) j1)) (or (<= 6 counter) (not (< j1 M1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 6))), 242003#(and (or (<= j2 j1) (not (< (+ 6 j1) M1))) (or (<= counter 0) (not (< (+ 6 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= 0 counter) (not (< (+ 6 j1) M1)))), 242000#(and (or (not (< (+ 3 j1) M1)) (<= (+ 3 j2) j1)) (or (not (< (+ 3 j1) M1)) (<= 3 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= counter 3))), 242001#(and (or (not (< (+ j1 4) M1)) (<= counter 2)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ j1 4) M1)) (<= 2 counter))), 242002#(and (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 5 j1) M1)) (<= 1 counter)) (or (not (< (+ 5 j1) M1)) (<= counter 1))), 241999#(< j1 M1), 241994#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 241998#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 241996#(and (or (<= counter 5) (not (< (+ j1 1) M1))) (or (<= (+ 5 j2) j1) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 5 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 21:38:08,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:38:08,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:08,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:38:08,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=812, Invalid=4158, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:38:08,104 INFO L87 Difference]: Start difference. First operand 862 states and 2221 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 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 21:38:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:13,303 INFO L93 Difference]: Finished difference Result 2583 states and 5347 transitions. [2022-03-15 21:38:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-15 21:38:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 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 28 [2022-03-15 21:38:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:13,307 INFO L225 Difference]: With dead ends: 2583 [2022-03-15 21:38:13,307 INFO L226 Difference]: Without dead ends: 2577 [2022-03-15 21:38:13,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4725 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3873, Invalid=17883, Unknown=0, NotChecked=0, Total=21756 [2022-03-15 21:38:13,308 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 359 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:13,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 0 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:38:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2577 states. [2022-03-15 21:38:13,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2577 to 861. [2022-03-15 21:38:13,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.582558139534884) internal successors, (2221), 860 states have internal predecessors, (2221), 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 21:38:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2221 transitions. [2022-03-15 21:38:13,323 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2221 transitions. Word has length 28 [2022-03-15 21:38:13,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:13,323 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 2221 transitions. [2022-03-15 21:38:13,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 27 states have internal predecessors, (51), 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 21:38:13,323 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2221 transitions. [2022-03-15 21:38:13,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:38:13,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:13,324 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:13,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-15 21:38:13,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:13,525 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:13,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:13,526 INFO L85 PathProgramCache]: Analyzing trace with hash 127243401, now seen corresponding path program 128 times [2022-03-15 21:38:13,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:13,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872701814] [2022-03-15 21:38:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:13,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:13,802 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:13,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872701814] [2022-03-15 21:38:13,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872701814] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:13,802 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168302064] [2022-03-15 21:38:13,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:38:13,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:13,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:13,803 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:13,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-15 21:38:13,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:38:13,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:13,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 21:38:13,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:14,399 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:14,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:16,221 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:16,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168302064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:16,222 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:16,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 59 [2022-03-15 21:38:16,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1477745461] [2022-03-15 21:38:16,222 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:16,223 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:16,228 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 21:38:16,228 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:16,885 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [246685#(and (or (not (< j1 M1)) (<= counter 5)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 5 counter)) (or (not (< j1 M1)) (<= (+ 5 j2) j1))), 246690#(< j1 M1), 246686#(and (or (<= counter 4) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 4 counter)) (or (<= (+ j2 4) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 246692#(and (or (not (< (+ j1 4) M1)) (<= 1 counter)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= (+ j2 1) j1)) (or (not (< (+ j1 4) M1)) (<= counter 1))), 246693#(and (or (not (< (+ 5 j1) M1)) (<= j2 j1)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= counter 0)) (or (not (< (+ 5 j1) M1)) (<= 0 counter))), 246602#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 246688#(and (or (not (< (+ 3 j1) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= 2 counter)) (or (not (< (+ 3 j1) M1)) (<= counter 2))), 246691#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 246689#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 246687#(and (or (<= counter 3) (not (< (+ 2 j1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 3 counter) (not (< (+ 2 j1) M1))))] [2022-03-15 21:38:16,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:38:16,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:16,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:38:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=3937, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:38:16,886 INFO L87 Difference]: Start difference. First operand 861 states and 2221 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 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 21:38:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:21,217 INFO L93 Difference]: Finished difference Result 2863 states and 5844 transitions. [2022-03-15 21:38:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 21:38:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 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 28 [2022-03-15 21:38:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:21,221 INFO L225 Difference]: With dead ends: 2863 [2022-03-15 21:38:21,221 INFO L226 Difference]: Without dead ends: 2855 [2022-03-15 21:38:21,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3558, Invalid=16182, Unknown=0, NotChecked=0, Total=19740 [2022-03-15 21:38:21,222 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 324 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:21,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 0 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:21,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2855 states. [2022-03-15 21:38:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2855 to 854. [2022-03-15 21:38:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 2.58147713950762) internal successors, (2202), 853 states have internal predecessors, (2202), 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 21:38:21,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2202 transitions. [2022-03-15 21:38:21,236 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2202 transitions. Word has length 28 [2022-03-15 21:38:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:21,236 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 2202 transitions. [2022-03-15 21:38:21,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 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 21:38:21,237 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2202 transitions. [2022-03-15 21:38:21,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:38:21,237 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:21,237 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:21,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-15 21:38:21,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-15 21:38:21,453 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 835110521, now seen corresponding path program 129 times [2022-03-15 21:38:21,454 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:21,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680164884] [2022-03-15 21:38:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:21,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:21,695 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:21,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680164884] [2022-03-15 21:38:21,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680164884] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:21,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039254379] [2022-03-15 21:38:21,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:38:21,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:21,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:21,696 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:21,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-15 21:38:21,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:38:21,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:21,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:38:21,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:22,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:23,840 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:23,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1039254379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:23,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:23,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 60 [2022-03-15 21:38:23,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [495126638] [2022-03-15 21:38:23,840 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:23,842 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:23,846 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 58 transitions. [2022-03-15 21:38:23,846 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:24,555 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [251633#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 251640#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 251638#(and (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 2 counter) (not (< (+ 2 j1) M1))) (or (<= counter 2) (not (< (+ 2 j1) M1)))), 251635#(and (or (not (< j1 M1)) (<= 4 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter 4) (not (< j1 M1))) (or (not (< j1 M1)) (<= (+ j2 4) j1))), 251636#(< j1 M1), 251632#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 251549#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 251639#(and (or (not (< (+ 3 j1) M1)) (<= counter 1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= 1 counter))), 251634#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 251637#(and (or (<= counter 3) (not (< (+ j1 1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= 3 counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 21:38:24,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:38:24,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:38:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=4078, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:38:24,556 INFO L87 Difference]: Start difference. First operand 854 states and 2202 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 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 21:38:27,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:27,710 INFO L93 Difference]: Finished difference Result 3113 states and 6295 transitions. [2022-03-15 21:38:27,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 21:38:27,711 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 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 28 [2022-03-15 21:38:27,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:27,714 INFO L225 Difference]: With dead ends: 3113 [2022-03-15 21:38:27,714 INFO L226 Difference]: Without dead ends: 3097 [2022-03-15 21:38:27,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3789 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2771, Invalid=12729, Unknown=0, NotChecked=0, Total=15500 [2022-03-15 21:38:27,715 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 231 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:27,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 0 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:38:27,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3097 states. [2022-03-15 21:38:27,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3097 to 844. [2022-03-15 21:38:27,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 2.5812574139976276) internal successors, (2176), 843 states have internal predecessors, (2176), 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 21:38:27,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2176 transitions. [2022-03-15 21:38:27,735 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2176 transitions. Word has length 28 [2022-03-15 21:38:27,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:27,736 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 2176 transitions. [2022-03-15 21:38:27,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 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 21:38:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2176 transitions. [2022-03-15 21:38:27,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:38:27,736 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:27,736 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:27,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-15 21:38:27,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable130 [2022-03-15 21:38:27,937 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:27,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:27,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1284252553, now seen corresponding path program 130 times [2022-03-15 21:38:27,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:27,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149658522] [2022-03-15 21:38:27,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:27,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:28,169 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:28,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:28,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149658522] [2022-03-15 21:38:28,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149658522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:28,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353065627] [2022-03-15 21:38:28,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:38:28,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:28,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:28,170 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:28,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-15 21:38:28,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:38:28,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:28,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-15 21:38:28,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:28,831 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:28,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:30,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353065627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:30,146 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:30,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 63 [2022-03-15 21:38:30,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1260621945] [2022-03-15 21:38:30,146 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:30,148 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:30,153 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 60 transitions. [2022-03-15 21:38:30,153 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:30,828 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [256787#(< j1 M1), 256783#(and (or (<= 2 counter) (not (< (+ j1 1) M1))) (or (<= counter 2) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 256784#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ 2 j1) M1))) (or (<= 1 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 256781#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 256785#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 256778#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter 3)) (or (not (< j1 M1)) (<= 3 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 256786#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 256780#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 256779#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 256782#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:38:30,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:38:30,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:30,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:38:30,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=4607, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:38:30,828 INFO L87 Difference]: Start difference. First operand 844 states and 2176 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 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 21:38:33,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:33,478 INFO L93 Difference]: Finished difference Result 3223 states and 6493 transitions. [2022-03-15 21:38:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 21:38:33,478 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 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 28 [2022-03-15 21:38:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:33,482 INFO L225 Difference]: With dead ends: 3223 [2022-03-15 21:38:33,482 INFO L226 Difference]: Without dead ends: 3183 [2022-03-15 21:38:33,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4045 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2646, Invalid=12854, Unknown=0, NotChecked=0, Total=15500 [2022-03-15 21:38:33,483 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 256 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:33,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 0 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:38:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3183 states. [2022-03-15 21:38:33,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3183 to 849. [2022-03-15 21:38:33,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 848 states have (on average 2.577830188679245) internal successors, (2186), 848 states have internal predecessors, (2186), 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 21:38:33,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 2186 transitions. [2022-03-15 21:38:33,499 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 2186 transitions. Word has length 28 [2022-03-15 21:38:33,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:33,499 INFO L470 AbstractCegarLoop]: Abstraction has 849 states and 2186 transitions. [2022-03-15 21:38:33,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 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 21:38:33,499 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 2186 transitions. [2022-03-15 21:38:33,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:38:33,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:33,500 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:33,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-03-15 21:38:33,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:33,707 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:33,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:33,707 INFO L85 PathProgramCache]: Analyzing trace with hash -925783943, now seen corresponding path program 131 times [2022-03-15 21:38:33,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:33,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175135569] [2022-03-15 21:38:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:33,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:33,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 19 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:33,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:33,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175135569] [2022-03-15 21:38:33,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175135569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:33,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190203105] [2022-03-15 21:38:33,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:38:33,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:33,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:33,918 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:33,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-15 21:38:33,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:38:33,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:33,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 21:38:33,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:34,454 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:34,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:35,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190203105] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:35,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:35,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 60 [2022-03-15 21:38:35,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1477574153] [2022-03-15 21:38:35,559 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:35,560 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:35,564 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 54 transitions. [2022-03-15 21:38:35,565 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:36,062 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [262038#(< j1 M1), 262035#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 262040#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 262039#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 262036#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 262041#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 262037#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 262034#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:38:36,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:38:36,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:36,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:38:36,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=4042, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:38:36,063 INFO L87 Difference]: Start difference. First operand 849 states and 2186 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 21:38:38,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:38,564 INFO L93 Difference]: Finished difference Result 3347 states and 6805 transitions. [2022-03-15 21:38:38,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-15 21:38:38,564 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 28 [2022-03-15 21:38:38,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:38,568 INFO L225 Difference]: With dead ends: 3347 [2022-03-15 21:38:38,568 INFO L226 Difference]: Without dead ends: 3323 [2022-03-15 21:38:38,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4227 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2587, Invalid=12419, Unknown=0, NotChecked=0, Total=15006 [2022-03-15 21:38:38,569 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:38,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:38:38,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3323 states. [2022-03-15 21:38:38,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3323 to 1031. [2022-03-15 21:38:38,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 2.622330097087379) internal successors, (2701), 1030 states have internal predecessors, (2701), 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 21:38:38,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 2701 transitions. [2022-03-15 21:38:38,586 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 2701 transitions. Word has length 28 [2022-03-15 21:38:38,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:38,586 INFO L470 AbstractCegarLoop]: Abstraction has 1031 states and 2701 transitions. [2022-03-15 21:38:38,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 21:38:38,586 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 2701 transitions. [2022-03-15 21:38:38,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:38:38,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:38,587 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:38,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-15 21:38:38,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:38,788 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:38,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:38,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1262399233, now seen corresponding path program 132 times [2022-03-15 21:38:38,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:38,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748050519] [2022-03-15 21:38:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:38,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:39,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:39,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748050519] [2022-03-15 21:38:39,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748050519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:39,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231531456] [2022-03-15 21:38:39,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:38:39,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:39,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:39,025 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:39,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-15 21:38:39,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:38:39,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:39,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 21:38:39,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:39,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:40,809 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:40,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231531456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:40,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:40,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 63 [2022-03-15 21:38:40,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1047071141] [2022-03-15 21:38:40,809 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:40,810 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:40,815 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 58 transitions. [2022-03-15 21:38:40,815 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:41,406 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [267789#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 267793#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 267790#(< j1 M1), 267788#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 267785#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 267792#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 267787#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 267786#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 267791#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 21:38:41,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:38:41,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:41,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:38:41,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=4515, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:38:41,407 INFO L87 Difference]: Start difference. First operand 1031 states and 2701 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 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 21:38:43,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:43,412 INFO L93 Difference]: Finished difference Result 2204 states and 4699 transitions. [2022-03-15 21:38:43,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 21:38:43,412 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 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 28 [2022-03-15 21:38:43,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:43,414 INFO L225 Difference]: With dead ends: 2204 [2022-03-15 21:38:43,414 INFO L226 Difference]: Without dead ends: 2174 [2022-03-15 21:38:43,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3508 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2144, Invalid=10966, Unknown=0, NotChecked=0, Total=13110 [2022-03-15 21:38:43,415 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 198 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:43,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 0 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:38:43,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2022-03-15 21:38:43,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 927. [2022-03-15 21:38:43,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 2.57451403887689) internal successors, (2384), 926 states have internal predecessors, (2384), 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 21:38:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2384 transitions. [2022-03-15 21:38:43,426 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2384 transitions. Word has length 28 [2022-03-15 21:38:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:43,426 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 2384 transitions. [2022-03-15 21:38:43,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 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 21:38:43,426 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2384 transitions. [2022-03-15 21:38:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:38:43,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:43,427 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:43,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-15 21:38:43,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-15 21:38:43,628 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:43,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:43,628 INFO L85 PathProgramCache]: Analyzing trace with hash 376600953, now seen corresponding path program 133 times [2022-03-15 21:38:43,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:43,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046429760] [2022-03-15 21:38:43,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:43,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:43,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:43,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:43,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046429760] [2022-03-15 21:38:43,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046429760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:43,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090969490] [2022-03-15 21:38:43,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:38:43,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:43,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:43,880 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:43,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-15 21:38:43,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:43,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:38:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:44,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:45,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090969490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:45,576 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:45,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 64 [2022-03-15 21:38:45,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1954185266] [2022-03-15 21:38:45,577 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:45,578 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:45,582 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 62 transitions. [2022-03-15 21:38:45,582 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:46,241 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [272168#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 272167#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 272170#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 272172#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 272165#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 272171#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 272164#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 272166#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 272163#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 272169#(< j1 M1)] [2022-03-15 21:38:46,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:38:46,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:46,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:38:46,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=4735, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:38:46,242 INFO L87 Difference]: Start difference. First operand 927 states and 2384 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 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 21:38:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:48,833 INFO L93 Difference]: Finished difference Result 2327 states and 4811 transitions. [2022-03-15 21:38:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 21:38:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 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 28 [2022-03-15 21:38:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:48,836 INFO L225 Difference]: With dead ends: 2327 [2022-03-15 21:38:48,836 INFO L226 Difference]: Without dead ends: 2283 [2022-03-15 21:38:48,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4544 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2989, Invalid=14303, Unknown=0, NotChecked=0, Total=17292 [2022-03-15 21:38:48,837 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 257 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:48,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 0 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:38:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-03-15 21:38:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 853. [2022-03-15 21:38:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 2.575117370892019) internal successors, (2194), 852 states have internal predecessors, (2194), 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 21:38:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2194 transitions. [2022-03-15 21:38:48,848 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2194 transitions. Word has length 28 [2022-03-15 21:38:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:48,848 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2194 transitions. [2022-03-15 21:38:48,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 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 21:38:48,848 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2194 transitions. [2022-03-15 21:38:48,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:38:48,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:48,849 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:48,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-15 21:38:49,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-15 21:38:49,049 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:49,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:49,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1399040887, now seen corresponding path program 134 times [2022-03-15 21:38:49,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:49,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720881873] [2022-03-15 21:38:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 24 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:49,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:49,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720881873] [2022-03-15 21:38:49,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720881873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:49,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315119910] [2022-03-15 21:38:49,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:38:49,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:49,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:49,254 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:49,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-15 21:38:49,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:38:49,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:49,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:38:49,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:49,888 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:49,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:50,770 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:50,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315119910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:50,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:50,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 59 [2022-03-15 21:38:50,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2031613502] [2022-03-15 21:38:50,771 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:50,772 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:50,776 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 48 transitions. [2022-03-15 21:38:50,776 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:51,128 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [276545#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 276544#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 276542#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 276546#(< j1 M1), 276543#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 276459#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:38:51,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:38:51,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:51,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:38:51,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=3526, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:38:51,128 INFO L87 Difference]: Start difference. First operand 853 states and 2194 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 21:38:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:53,825 INFO L93 Difference]: Finished difference Result 3052 states and 6350 transitions. [2022-03-15 21:38:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-15 21:38:53,826 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 28 [2022-03-15 21:38:53,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:53,829 INFO L225 Difference]: With dead ends: 3052 [2022-03-15 21:38:53,830 INFO L226 Difference]: Without dead ends: 3038 [2022-03-15 21:38:53,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4910 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3259, Invalid=14033, Unknown=0, NotChecked=0, Total=17292 [2022-03-15 21:38:53,831 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 219 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:53,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 0 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:38:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3038 states. [2022-03-15 21:38:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3038 to 1059. [2022-03-15 21:38:53,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 2.6351606805293004) internal successors, (2788), 1058 states have internal predecessors, (2788), 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 21:38:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 2788 transitions. [2022-03-15 21:38:53,849 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 2788 transitions. Word has length 28 [2022-03-15 21:38:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:53,849 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 2788 transitions. [2022-03-15 21:38:53,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 21:38:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 2788 transitions. [2022-03-15 21:38:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:38:53,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:53,850 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:53,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-03-15 21:38:54,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-15 21:38:54,066 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:54,066 INFO L85 PathProgramCache]: Analyzing trace with hash 749755649, now seen corresponding path program 135 times [2022-03-15 21:38:54,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:54,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824000741] [2022-03-15 21:38:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:54,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:54,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 25 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:54,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:54,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824000741] [2022-03-15 21:38:54,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824000741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:54,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781407968] [2022-03-15 21:38:54,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:38:54,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:54,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:54,280 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:54,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-15 21:38:54,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:38:54,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:54,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 21:38:54,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:54,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:55,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781407968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:55,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:55,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 62 [2022-03-15 21:38:55,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [633616665] [2022-03-15 21:38:55,919 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:55,920 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:55,924 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 52 transitions. [2022-03-15 21:38:55,924 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:56,349 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [282079#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 282076#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 282081#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 282077#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 282080#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 282078#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 282082#(< j1 M1)] [2022-03-15 21:38:56,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:38:56,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:56,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:38:56,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=4123, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:38:56,350 INFO L87 Difference]: Start difference. First operand 1059 states and 2788 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 21:38:59,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:59,003 INFO L93 Difference]: Finished difference Result 2742 states and 5774 transitions. [2022-03-15 21:38:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-15 21:38:59,004 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 28 [2022-03-15 21:38:59,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:59,006 INFO L225 Difference]: With dead ends: 2742 [2022-03-15 21:38:59,006 INFO L226 Difference]: Without dead ends: 2724 [2022-03-15 21:38:59,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4979 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3344, Invalid=14746, Unknown=0, NotChecked=0, Total=18090 [2022-03-15 21:38:59,007 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 237 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:59,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 0 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:38:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2022-03-15 21:38:59,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 1049. [2022-03-15 21:38:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 2.6259541984732824) internal successors, (2752), 1048 states have internal predecessors, (2752), 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 21:38:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 2752 transitions. [2022-03-15 21:38:59,021 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 2752 transitions. Word has length 28 [2022-03-15 21:38:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:59,021 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 2752 transitions. [2022-03-15 21:38:59,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 21:38:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 2752 transitions. [2022-03-15 21:38:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:38:59,022 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:59,022 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:59,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-15 21:38:59,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-15 21:38:59,222 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:59,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:59,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1357028471, now seen corresponding path program 136 times [2022-03-15 21:38:59,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:59,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523806288] [2022-03-15 21:38:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:59,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:59,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 26 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:59,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:59,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523806288] [2022-03-15 21:38:59,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523806288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:59,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734524800] [2022-03-15 21:38:59,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:38:59,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:59,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:59,449 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:38:59,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-15 21:38:59,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:38:59,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:59,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 21:38:59,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:00,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:01,049 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:01,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734524800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:01,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:01,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 63 [2022-03-15 21:39:01,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [296676656] [2022-03-15 21:39:01,050 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:01,051 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:01,056 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 21:39:01,056 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:01,583 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [287284#(< j1 M1), 287286#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 287285#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 287279#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 287280#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 287283#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 287281#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 287282#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:39:01,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:39:01,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:39:01,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=4398, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:39:01,584 INFO L87 Difference]: Start difference. First operand 1049 states and 2752 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 21:39:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:03,812 INFO L93 Difference]: Finished difference Result 2336 states and 5024 transitions. [2022-03-15 21:39:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 21:39:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 28 [2022-03-15 21:39:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:03,815 INFO L225 Difference]: With dead ends: 2336 [2022-03-15 21:39:03,815 INFO L226 Difference]: Without dead ends: 2314 [2022-03-15 21:39:03,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4378 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2743, Invalid=13007, Unknown=0, NotChecked=0, Total=15750 [2022-03-15 21:39:03,816 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 267 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:03,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 0 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:03,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-03-15 21:39:03,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1029. [2022-03-15 21:39:03,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 2.61284046692607) internal successors, (2686), 1028 states have internal predecessors, (2686), 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 21:39:03,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 2686 transitions. [2022-03-15 21:39:03,828 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 2686 transitions. Word has length 28 [2022-03-15 21:39:03,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:03,829 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 2686 transitions. [2022-03-15 21:39:03,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 21:39:03,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 2686 transitions. [2022-03-15 21:39:03,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:03,830 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:03,830 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:03,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:04,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:04,032 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:04,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:04,032 INFO L85 PathProgramCache]: Analyzing trace with hash 2052140545, now seen corresponding path program 137 times [2022-03-15 21:39:04,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:04,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594217038] [2022-03-15 21:39:04,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:04,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 27 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:04,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:04,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594217038] [2022-03-15 21:39:04,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594217038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:04,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178840138] [2022-03-15 21:39:04,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:39:04,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:04,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:04,259 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:04,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-15 21:39:04,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:39:04,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:04,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:39:04,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:04,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 21 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:05,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178840138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:05,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:05,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 62 [2022-03-15 21:39:05,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [419128773] [2022-03-15 21:39:05,719 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:05,720 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:05,725 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 60 transitions. [2022-03-15 21:39:05,725 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:06,303 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [292016#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 292022#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 292020#(< j1 M1), 292014#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 292019#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 292021#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 292015#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 292018#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 292017#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:39:06,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:39:06,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:06,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:39:06,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=4418, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:39:06,304 INFO L87 Difference]: Start difference. First operand 1029 states and 2686 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 21:39:07,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:07,968 INFO L93 Difference]: Finished difference Result 1742 states and 3895 transitions. [2022-03-15 21:39:07,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:39:07,968 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 28 [2022-03-15 21:39:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:07,970 INFO L225 Difference]: With dead ends: 1742 [2022-03-15 21:39:07,970 INFO L226 Difference]: Without dead ends: 1716 [2022-03-15 21:39:07,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1876, Invalid=10114, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 21:39:07,970 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 203 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:07,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 0 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:07,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-03-15 21:39:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 929. [2022-03-15 21:39:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 2.5668103448275863) internal successors, (2382), 928 states have internal predecessors, (2382), 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 21:39:07,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 2382 transitions. [2022-03-15 21:39:07,981 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 2382 transitions. Word has length 28 [2022-03-15 21:39:07,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:07,981 INFO L470 AbstractCegarLoop]: Abstraction has 929 states and 2382 transitions. [2022-03-15 21:39:07,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 21:39:07,981 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 2382 transitions. [2022-03-15 21:39:07,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:07,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:07,982 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:07,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-15 21:39:08,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-15 21:39:08,182 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:08,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:08,182 INFO L85 PathProgramCache]: Analyzing trace with hash 362197641, now seen corresponding path program 138 times [2022-03-15 21:39:08,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:08,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500534857] [2022-03-15 21:39:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:08,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:08,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:08,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:08,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500534857] [2022-03-15 21:39:08,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500534857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:08,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334473336] [2022-03-15 21:39:08,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:39:08,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:08,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:08,423 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:08,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-15 21:39:08,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:39:08,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:08,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 21:39:08,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:09,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:10,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334473336] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:10,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:10,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 65 [2022-03-15 21:39:10,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [46660348] [2022-03-15 21:39:10,039 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:10,040 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:10,045 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 21:39:10,045 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:10,724 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [295934#(< j1 M1), 295936#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 295927#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 295928#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 295933#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 295932#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 295929#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 295935#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 295931#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 295930#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:39:10,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:39:10,724 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:10,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:39:10,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=4873, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:39:10,724 INFO L87 Difference]: Start difference. First operand 929 states and 2382 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 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 21:39:13,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:13,065 INFO L93 Difference]: Finished difference Result 1805 states and 3905 transitions. [2022-03-15 21:39:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 21:39:13,066 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 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 28 [2022-03-15 21:39:13,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:13,068 INFO L225 Difference]: With dead ends: 1805 [2022-03-15 21:39:13,068 INFO L226 Difference]: Without dead ends: 1763 [2022-03-15 21:39:13,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4581 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2970, Invalid=14060, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 21:39:13,068 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 242 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:13,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 0 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:13,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1763 states. [2022-03-15 21:39:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1763 to 856. [2022-03-15 21:39:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 2.573099415204678) internal successors, (2200), 855 states have internal predecessors, (2200), 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 21:39:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 2200 transitions. [2022-03-15 21:39:13,078 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 2200 transitions. Word has length 28 [2022-03-15 21:39:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:13,078 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 2200 transitions. [2022-03-15 21:39:13,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 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 21:39:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 2200 transitions. [2022-03-15 21:39:13,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:13,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:13,079 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:13,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:13,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-15 21:39:13,280 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:13,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:13,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1902724743, now seen corresponding path program 139 times [2022-03-15 21:39:13,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:13,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662384872] [2022-03-15 21:39:13,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:13,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:13,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 30 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:13,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:13,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662384872] [2022-03-15 21:39:13,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662384872] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:13,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495078871] [2022-03-15 21:39:13,474 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:39:13,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:13,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:13,475 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:13,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-15 21:39:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:13,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:39:13,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:14,142 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:14,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:14,961 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:14,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495078871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:14,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:14,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 60 [2022-03-15 21:39:14,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1356633727] [2022-03-15 21:39:14,962 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:14,963 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:14,967 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 21:39:14,967 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:15,174 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [299788#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 299790#(< j1 M1), 299789#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 299787#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 21:39:15,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:39:15,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:15,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:39:15,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3482, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:39:15,175 INFO L87 Difference]: Start difference. First operand 856 states and 2200 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:17,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:17,348 INFO L93 Difference]: Finished difference Result 2122 states and 4709 transitions. [2022-03-15 21:39:17,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 21:39:17,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 21:39:17,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:17,351 INFO L225 Difference]: With dead ends: 2122 [2022-03-15 21:39:17,351 INFO L226 Difference]: Without dead ends: 2116 [2022-03-15 21:39:17,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4368 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3234, Invalid=13278, Unknown=0, NotChecked=0, Total=16512 [2022-03-15 21:39:17,352 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 224 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:17,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 0 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2116 states. [2022-03-15 21:39:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2116 to 1055. [2022-03-15 21:39:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.630929791271347) internal successors, (2773), 1054 states have internal predecessors, (2773), 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 21:39:17,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2773 transitions. [2022-03-15 21:39:17,367 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2773 transitions. Word has length 28 [2022-03-15 21:39:17,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:17,367 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 2773 transitions. [2022-03-15 21:39:17,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:17,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2773 transitions. [2022-03-15 21:39:17,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:17,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:17,368 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:17,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-15 21:39:17,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:17,568 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:17,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:17,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1076085249, now seen corresponding path program 140 times [2022-03-15 21:39:17,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:17,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813169837] [2022-03-15 21:39:17,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:17,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:17,769 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 31 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:17,769 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:17,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813169837] [2022-03-15 21:39:17,769 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813169837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:17,769 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284109937] [2022-03-15 21:39:17,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:39:17,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:17,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:17,770 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:17,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-15 21:39:17,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:39:17,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:17,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 21:39:17,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:18,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:19,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284109937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:19,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:19,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 59 [2022-03-15 21:39:19,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1423985442] [2022-03-15 21:39:19,164 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:19,165 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:19,169 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 46 transitions. [2022-03-15 21:39:19,169 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:19,461 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [304373#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 304375#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 304290#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 304374#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 304376#(< j1 M1)] [2022-03-15 21:39:19,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:39:19,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:19,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:39:19,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3397, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:39:19,462 INFO L87 Difference]: Start difference. First operand 1055 states and 2773 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 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 21:39:21,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:21,861 INFO L93 Difference]: Finished difference Result 2171 states and 4803 transitions. [2022-03-15 21:39:21,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-15 21:39:21,861 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 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 28 [2022-03-15 21:39:21,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:21,864 INFO L225 Difference]: With dead ends: 2171 [2022-03-15 21:39:21,864 INFO L226 Difference]: Without dead ends: 2163 [2022-03-15 21:39:21,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4969 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3410, Invalid=14412, Unknown=0, NotChecked=0, Total=17822 [2022-03-15 21:39:21,865 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 209 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:21,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 0 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:21,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2163 states. [2022-03-15 21:39:21,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2163 to 1059. [2022-03-15 21:39:21,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 2.627599243856333) internal successors, (2780), 1058 states have internal predecessors, (2780), 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 21:39:21,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 2780 transitions. [2022-03-15 21:39:21,878 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 2780 transitions. Word has length 28 [2022-03-15 21:39:21,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:21,878 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 2780 transitions. [2022-03-15 21:39:21,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 23 states have internal predecessors, (42), 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 21:39:21,878 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 2780 transitions. [2022-03-15 21:39:21,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:21,879 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:21,879 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:21,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:22,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:22,079 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:22,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:22,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1070085511, now seen corresponding path program 141 times [2022-03-15 21:39:22,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:22,080 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810868920] [2022-03-15 21:39:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:22,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:22,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:22,273 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 32 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:22,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:22,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810868920] [2022-03-15 21:39:22,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810868920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:22,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759152168] [2022-03-15 21:39:22,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:39:22,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:22,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:22,275 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:22,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-15 21:39:22,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:39:22,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:22,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-15 21:39:22,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:22,928 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:22,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:23,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759152168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:23,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:23,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 62 [2022-03-15 21:39:23,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1477131253] [2022-03-15 21:39:23,755 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:23,756 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:23,761 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 50 transitions. [2022-03-15 21:39:23,761 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:24,141 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [309035#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 309036#(< j1 M1), 309032#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 309033#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 309031#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 309034#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:39:24,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:39:24,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:24,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:39:24,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=4024, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:39:24,142 INFO L87 Difference]: Start difference. First operand 1059 states and 2780 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 21:39:26,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:26,648 INFO L93 Difference]: Finished difference Result 2097 states and 4659 transitions. [2022-03-15 21:39:26,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-15 21:39:26,649 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 28 [2022-03-15 21:39:26,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:26,651 INFO L225 Difference]: With dead ends: 2097 [2022-03-15 21:39:26,651 INFO L226 Difference]: Without dead ends: 2087 [2022-03-15 21:39:26,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5234 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3490, Invalid=15416, Unknown=0, NotChecked=0, Total=18906 [2022-03-15 21:39:26,652 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 221 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:26,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 0 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2087 states. [2022-03-15 21:39:26,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2087 to 1055. [2022-03-15 21:39:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.621442125237192) internal successors, (2763), 1054 states have internal predecessors, (2763), 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 21:39:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 2763 transitions. [2022-03-15 21:39:26,666 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 2763 transitions. Word has length 28 [2022-03-15 21:39:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:26,666 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 2763 transitions. [2022-03-15 21:39:26,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 21:39:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 2763 transitions. [2022-03-15 21:39:26,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:26,667 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:26,667 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:26,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-15 21:39:26,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:26,868 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:26,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:26,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1118097665, now seen corresponding path program 142 times [2022-03-15 21:39:26,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:26,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860634053] [2022-03-15 21:39:26,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:26,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:26,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 33 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:27,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:27,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860634053] [2022-03-15 21:39:27,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860634053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:27,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867871087] [2022-03-15 21:39:27,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:39:27,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:27,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:27,083 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:27,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-15 21:39:27,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:39:27,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:27,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:39:27,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:27,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:28,590 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:28,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867871087] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:28,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:28,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 63 [2022-03-15 21:39:28,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [635482643] [2022-03-15 21:39:28,591 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:28,592 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:28,596 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 54 transitions. [2022-03-15 21:39:28,596 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:29,065 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [313610#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 313614#(< j1 M1), 313612#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 313608#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 313609#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 313611#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 313613#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4)))] [2022-03-15 21:39:29,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:39:29,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:29,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:39:29,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=4268, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:39:29,066 INFO L87 Difference]: Start difference. First operand 1055 states and 2763 transitions. Second operand has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 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 21:39:31,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:31,446 INFO L93 Difference]: Finished difference Result 1934 states and 4342 transitions. [2022-03-15 21:39:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 21:39:31,446 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 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 28 [2022-03-15 21:39:31,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:31,448 INFO L225 Difference]: With dead ends: 1934 [2022-03-15 21:39:31,448 INFO L226 Difference]: Without dead ends: 1922 [2022-03-15 21:39:31,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4719 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3222, Invalid=14334, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 21:39:31,449 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 280 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:31,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 0 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:31,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1922 states. [2022-03-15 21:39:31,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1922 to 1043. [2022-03-15 21:39:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 2.6122840690978886) internal successors, (2722), 1042 states have internal predecessors, (2722), 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 21:39:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 2722 transitions. [2022-03-15 21:39:31,461 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 2722 transitions. Word has length 28 [2022-03-15 21:39:31,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:31,461 INFO L470 AbstractCegarLoop]: Abstraction has 1043 states and 2722 transitions. [2022-03-15 21:39:31,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.7142857142857142) internal successors, (48), 27 states have internal predecessors, (48), 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 21:39:31,461 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 2722 transitions. [2022-03-15 21:39:31,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:31,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:31,462 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:31,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-15 21:39:31,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2022-03-15 21:39:31,662 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:31,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash 232299385, now seen corresponding path program 143 times [2022-03-15 21:39:31,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:31,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441161544] [2022-03-15 21:39:31,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:31,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 34 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:31,883 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:31,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441161544] [2022-03-15 21:39:31,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441161544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:31,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321333644] [2022-03-15 21:39:31,883 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:39:31,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:31,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:31,884 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:31,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-15 21:39:31,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:39:31,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:31,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:39:31,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:32,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:33,225 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:33,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321333644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:33,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:33,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 62 [2022-03-15 21:39:33,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1788369486] [2022-03-15 21:39:33,225 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:33,227 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:33,231 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 58 transitions. [2022-03-15 21:39:33,231 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:33,733 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [317985#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 317987#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 317989#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 317990#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 317988#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 317991#(< j1 M1), 317986#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 317984#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 21:39:33,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:39:33,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:39:33,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=4296, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:39:33,734 INFO L87 Difference]: Start difference. First operand 1043 states and 2722 transitions. Second operand has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 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 21:39:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:35,785 INFO L93 Difference]: Finished difference Result 1691 states and 3870 transitions. [2022-03-15 21:39:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-15 21:39:35,786 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 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 28 [2022-03-15 21:39:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:35,788 INFO L225 Difference]: With dead ends: 1691 [2022-03-15 21:39:35,788 INFO L226 Difference]: Without dead ends: 1677 [2022-03-15 21:39:35,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4221 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2371, Invalid=11909, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 21:39:35,790 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 264 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:35,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 0 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:35,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1677 states. [2022-03-15 21:39:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1677 to 1023. [2022-03-15 21:39:35,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.599804305283757) internal successors, (2657), 1022 states have internal predecessors, (2657), 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 21:39:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2657 transitions. [2022-03-15 21:39:35,811 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2657 transitions. Word has length 28 [2022-03-15 21:39:35,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:35,811 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 2657 transitions. [2022-03-15 21:39:35,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7) internal successors, (51), 29 states have internal predecessors, (51), 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 21:39:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2657 transitions. [2022-03-15 21:39:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:35,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:35,812 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:35,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:36,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-15 21:39:36,013 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1457643519, now seen corresponding path program 144 times [2022-03-15 21:39:36,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:36,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275643258] [2022-03-15 21:39:36,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:36,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:36,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 35 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:36,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:36,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275643258] [2022-03-15 21:39:36,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275643258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:36,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838787762] [2022-03-15 21:39:36,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:39:36,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:36,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:36,269 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:36,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-15 21:39:36,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:39:36,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:36,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:39:36,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:37,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:37,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838787762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:37,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:37,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 65 [2022-03-15 21:39:37,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1780045917] [2022-03-15 21:39:37,954 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:37,955 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:37,960 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 62 transitions. [2022-03-15 21:39:37,960 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:38,589 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [322057#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 322059#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 322063#(< j1 M1), 322055#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 322061#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 322062#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 322060#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 322056#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 322058#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:39:38,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:39:38,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:38,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:39:38,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=758, Invalid=4792, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:39:38,590 INFO L87 Difference]: Start difference. First operand 1023 states and 2657 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 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 21:39:40,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:40,146 INFO L93 Difference]: Finished difference Result 1360 states and 3196 transitions. [2022-03-15 21:39:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:39:40,146 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 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 28 [2022-03-15 21:39:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:40,148 INFO L225 Difference]: With dead ends: 1360 [2022-03-15 21:39:40,148 INFO L226 Difference]: Without dead ends: 1344 [2022-03-15 21:39:40,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3309 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1760, Invalid=9582, Unknown=0, NotChecked=0, Total=11342 [2022-03-15 21:39:40,149 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 237 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:40,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 0 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:40,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-03-15 21:39:40,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 931. [2022-03-15 21:39:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 2.5591397849462365) internal successors, (2380), 930 states have internal predecessors, (2380), 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 21:39:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 2380 transitions. [2022-03-15 21:39:40,158 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 2380 transitions. Word has length 28 [2022-03-15 21:39:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:40,158 INFO L470 AbstractCegarLoop]: Abstraction has 931 states and 2380 transitions. [2022-03-15 21:39:40,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 31 states have internal predecessors, (54), 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 21:39:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 2380 transitions. [2022-03-15 21:39:40,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:40,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:40,159 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:40,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:40,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-15 21:39:40,360 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:40,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1988701305, now seen corresponding path program 145 times [2022-03-15 21:39:40,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:40,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380020783] [2022-03-15 21:39:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:40,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:40,667 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:40,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:40,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380020783] [2022-03-15 21:39:40,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380020783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:40,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484061687] [2022-03-15 21:39:40,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:39:40,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:40,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:40,668 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:40,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-15 21:39:40,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:40,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 21:39:40,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:41,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:42,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484061687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:42,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:42,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 66 [2022-03-15 21:39:42,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [690839152] [2022-03-15 21:39:42,113 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:42,114 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:42,119 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 66 transitions. [2022-03-15 21:39:42,119 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:42,811 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [325579#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 325583#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 325582#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 325580#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 325585#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 325586#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 325584#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 325581#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 325587#(or (<= (+ 9 j2) M2) (<= counter 7) (<= M2 (+ 7 j2))), 325588#(< j1 M1)] [2022-03-15 21:39:42,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:39:42,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:39:42,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=5010, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:39:42,811 INFO L87 Difference]: Start difference. First operand 931 states and 2380 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 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 21:39:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:44,695 INFO L93 Difference]: Finished difference Result 1290 states and 3003 transitions. [2022-03-15 21:39:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:39:44,695 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 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 28 [2022-03-15 21:39:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:44,696 INFO L225 Difference]: With dead ends: 1290 [2022-03-15 21:39:44,696 INFO L226 Difference]: Without dead ends: 1272 [2022-03-15 21:39:44,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3943 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2422, Invalid=11858, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 21:39:44,697 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 237 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:44,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 0 Invalid, 967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:44,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-03-15 21:39:44,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 858. [2022-03-15 21:39:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.571761960326721) internal successors, (2204), 857 states have internal predecessors, (2204), 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 21:39:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2204 transitions. [2022-03-15 21:39:44,706 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2204 transitions. Word has length 28 [2022-03-15 21:39:44,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:44,706 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 2204 transitions. [2022-03-15 21:39:44,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 33 states have internal predecessors, (57), 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 21:39:44,706 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2204 transitions. [2022-03-15 21:39:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:44,706 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:44,706 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:44,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-15 21:39:44,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:44,907 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1979745673, now seen corresponding path program 146 times [2022-03-15 21:39:44,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:44,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037018199] [2022-03-15 21:39:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:44,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 37 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:45,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:45,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037018199] [2022-03-15 21:39:45,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037018199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:45,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117346910] [2022-03-15 21:39:45,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:39:45,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:45,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:45,055 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:45,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-15 21:39:45,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:39:45,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:45,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 21:39:45,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:45,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:46,318 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:46,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117346910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:46,319 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:46,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 22] total 56 [2022-03-15 21:39:46,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1300586113] [2022-03-15 21:39:46,319 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:46,320 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:46,324 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2022-03-15 21:39:46,324 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:46,397 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [328900#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 328901#(< j1 M1)] [2022-03-15 21:39:46,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:39:46,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:46,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:39:46,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=640, Invalid=2782, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:39:46,398 INFO L87 Difference]: Start difference. First operand 858 states and 2204 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 21:39:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:46,963 INFO L93 Difference]: Finished difference Result 1680 states and 3813 transitions. [2022-03-15 21:39:46,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:39:46,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 28 [2022-03-15 21:39:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:46,965 INFO L225 Difference]: With dead ends: 1680 [2022-03-15 21:39:46,965 INFO L226 Difference]: Without dead ends: 1676 [2022-03-15 21:39:46,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2150 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1334, Invalid=5638, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 21:39:46,966 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 157 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:46,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 0 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:39:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-03-15 21:39:46,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1030. [2022-03-15 21:39:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.6122448979591835) internal successors, (2688), 1029 states have internal predecessors, (2688), 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 21:39:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2688 transitions. [2022-03-15 21:39:46,978 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2688 transitions. Word has length 28 [2022-03-15 21:39:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:46,978 INFO L470 AbstractCegarLoop]: Abstraction has 1030 states and 2688 transitions. [2022-03-15 21:39:46,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 17 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 21:39:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2688 transitions. [2022-03-15 21:39:46,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:46,979 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:46,979 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:46,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:47,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-15 21:39:47,179 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:47,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1106004993, now seen corresponding path program 147 times [2022-03-15 21:39:47,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:47,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432601850] [2022-03-15 21:39:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:47,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 38 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:47,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:47,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432601850] [2022-03-15 21:39:47,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432601850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:47,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005283315] [2022-03-15 21:39:47,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:39:47,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:47,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:47,338 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:47,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-15 21:39:47,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:39:47,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-15 21:39:47,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:47,963 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:47,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:48,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005283315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:48,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:48,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 22, 22] total 59 [2022-03-15 21:39:48,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1593421907] [2022-03-15 21:39:48,689 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:48,690 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:48,702 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 21:39:48,702 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:48,851 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [332915#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 332916#(< j1 M1), 332914#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:39:48,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:39:48,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:48,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:39:48,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=3264, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:39:48,852 INFO L87 Difference]: Start difference. First operand 1030 states and 2688 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 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 21:39:49,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:49,586 INFO L93 Difference]: Finished difference Result 1799 states and 4059 transitions. [2022-03-15 21:39:49,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:39:49,586 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 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 28 [2022-03-15 21:39:49,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:49,588 INFO L225 Difference]: With dead ends: 1799 [2022-03-15 21:39:49,588 INFO L226 Difference]: Without dead ends: 1793 [2022-03-15 21:39:49,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2667 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1608, Invalid=7322, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 21:39:49,589 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 182 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:49,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 0 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:39:49,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1793 states. [2022-03-15 21:39:49,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1793 to 1042. [2022-03-15 21:39:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.6128722382324687) internal successors, (2720), 1041 states have internal predecessors, (2720), 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 21:39:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2720 transitions. [2022-03-15 21:39:49,602 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2720 transitions. Word has length 28 [2022-03-15 21:39:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:49,602 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 2720 transitions. [2022-03-15 21:39:49,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 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 21:39:49,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2720 transitions. [2022-03-15 21:39:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:49,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:49,603 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:49,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-15 21:39:49,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-15 21:39:49,819 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:49,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:49,819 INFO L85 PathProgramCache]: Analyzing trace with hash -210152311, now seen corresponding path program 148 times [2022-03-15 21:39:49,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:49,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787292332] [2022-03-15 21:39:49,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:49,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 39 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:50,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:50,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787292332] [2022-03-15 21:39:50,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787292332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:50,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35584811] [2022-03-15 21:39:50,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:39:50,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:50,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:50,010 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:50,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-15 21:39:50,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:39:50,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:50,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:39:50,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:50,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:51,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35584811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:51,254 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:51,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 58 [2022-03-15 21:39:51,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1008279879] [2022-03-15 21:39:51,254 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:51,255 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:51,259 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 44 transitions. [2022-03-15 21:39:51,259 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:51,466 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [337088#(< j1 M1), 337085#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 337086#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 337087#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:39:51,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:39:51,466 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:51,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:39:51,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=3296, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:39:51,466 INFO L87 Difference]: Start difference. First operand 1042 states and 2720 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 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 21:39:52,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:52,327 INFO L93 Difference]: Finished difference Result 1834 states and 4133 transitions. [2022-03-15 21:39:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:39:52,327 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 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 28 [2022-03-15 21:39:52,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:52,330 INFO L225 Difference]: With dead ends: 1834 [2022-03-15 21:39:52,330 INFO L226 Difference]: Without dead ends: 1826 [2022-03-15 21:39:52,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3028 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1672, Invalid=7834, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 21:39:52,330 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 220 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:52,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 0 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:39:52,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1826 states. [2022-03-15 21:39:52,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1826 to 1048. [2022-03-15 21:39:52,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.6112702960840495) internal successors, (2734), 1047 states have internal predecessors, (2734), 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 21:39:52,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2734 transitions. [2022-03-15 21:39:52,343 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2734 transitions. Word has length 28 [2022-03-15 21:39:52,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:52,343 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 2734 transitions. [2022-03-15 21:39:52,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 21 states have internal predecessors, (40), 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 21:39:52,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2734 transitions. [2022-03-15 21:39:52,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:52,344 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:52,344 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:52,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:52,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:52,544 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:52,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:52,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1938644225, now seen corresponding path program 149 times [2022-03-15 21:39:52,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:52,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271065024] [2022-03-15 21:39:52,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:52,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:52,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 40 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:52,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:52,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271065024] [2022-03-15 21:39:52,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271065024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:52,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983434194] [2022-03-15 21:39:52,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:39:52,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:52,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:52,720 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:52,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-15 21:39:52,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:39:52,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:52,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:39:52,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:53,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:54,028 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:54,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983434194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:54,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:54,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 59 [2022-03-15 21:39:54,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1129609211] [2022-03-15 21:39:54,029 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:54,030 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:54,034 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 48 transitions. [2022-03-15 21:39:54,034 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:54,376 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [341315#(< j1 M1), 341314#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 341311#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 341313#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 341312#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:39:54,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:39:54,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:54,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:39:54,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=613, Invalid=3547, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:39:54,377 INFO L87 Difference]: Start difference. First operand 1048 states and 2734 transitions. Second operand has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 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 21:39:55,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:55,371 INFO L93 Difference]: Finished difference Result 1809 states and 4087 transitions. [2022-03-15 21:39:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:39:55,372 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 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 28 [2022-03-15 21:39:55,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:55,374 INFO L225 Difference]: With dead ends: 1809 [2022-03-15 21:39:55,374 INFO L226 Difference]: Without dead ends: 1799 [2022-03-15 21:39:55,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3305 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1744, Invalid=8356, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 21:39:55,374 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 245 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:55,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 0 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:39:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-03-15 21:39:55,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1048. [2022-03-15 21:39:55,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.6074498567335245) internal successors, (2730), 1047 states have internal predecessors, (2730), 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 21:39:55,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 2730 transitions. [2022-03-15 21:39:55,385 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 2730 transitions. Word has length 28 [2022-03-15 21:39:55,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:55,385 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 2730 transitions. [2022-03-15 21:39:55,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7916666666666667) internal successors, (43), 23 states have internal predecessors, (43), 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 21:39:55,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 2730 transitions. [2022-03-15 21:39:55,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:55,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:55,386 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:55,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-15 21:39:55,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2022-03-15 21:39:55,587 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash -168139895, now seen corresponding path program 150 times [2022-03-15 21:39:55,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:55,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089666114] [2022-03-15 21:39:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:55,790 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 41 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:55,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:55,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089666114] [2022-03-15 21:39:55,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089666114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:55,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913305916] [2022-03-15 21:39:55,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:39:55,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:55,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:55,791 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:55,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-15 21:39:55,819 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:39:55,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:55,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:39:55,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:56,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:57,060 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:57,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913305916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:57,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:57,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 22, 22] total 60 [2022-03-15 21:39:57,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [56901800] [2022-03-15 21:39:57,060 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:57,061 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:57,066 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 52 transitions. [2022-03-15 21:39:57,066 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:57,443 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [345519#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 345518#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 345516#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 345517#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 345521#(< j1 M1), 345520#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4)))] [2022-03-15 21:39:57,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:39:57,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:57,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:39:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=627, Invalid=3795, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:39:57,444 INFO L87 Difference]: Start difference. First operand 1048 states and 2730 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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 21:39:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:58,450 INFO L93 Difference]: Finished difference Result 1730 states and 3933 transitions. [2022-03-15 21:39:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:39:58,450 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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 28 [2022-03-15 21:39:58,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:58,453 INFO L225 Difference]: With dead ends: 1730 [2022-03-15 21:39:58,453 INFO L226 Difference]: Without dead ends: 1718 [2022-03-15 21:39:58,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1739, Invalid=8563, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 21:39:58,454 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 252 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:58,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 0 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:39:58,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-03-15 21:39:58,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1042. [2022-03-15 21:39:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1042 states, 1041 states have (on average 2.601344860710855) internal successors, (2708), 1041 states have internal predecessors, (2708), 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 21:39:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1042 states to 1042 states and 2708 transitions. [2022-03-15 21:39:58,474 INFO L78 Accepts]: Start accepts. Automaton has 1042 states and 2708 transitions. Word has length 28 [2022-03-15 21:39:58,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:58,474 INFO L470 AbstractCegarLoop]: Abstraction has 1042 states and 2708 transitions. [2022-03-15 21:39:58,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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 21:39:58,474 INFO L276 IsEmpty]: Start isEmpty. Operand 1042 states and 2708 transitions. [2022-03-15 21:39:58,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:39:58,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:58,475 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:58,490 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:58,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:58,675 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:58,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:58,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1053938175, now seen corresponding path program 151 times [2022-03-15 21:39:58,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:58,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747106281] [2022-03-15 21:39:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:58,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:58,884 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 42 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:58,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:58,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747106281] [2022-03-15 21:39:58,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747106281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:58,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319787561] [2022-03-15 21:39:58,884 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:39:58,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:58,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:58,885 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:39:58,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-15 21:39:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:58,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:39:58,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:59,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:00,172 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:00,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319787561] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:00,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:00,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 22] total 61 [2022-03-15 21:40:00,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2089316301] [2022-03-15 21:40:00,173 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:00,174 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:00,178 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 21:40:00,179 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:00,632 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [349636#(< j1 M1), 349634#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 349630#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 349635#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 349633#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 349632#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 349631#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:40:00,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:40:00,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:40:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=655, Invalid=4037, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:40:00,632 INFO L87 Difference]: Start difference. First operand 1042 states and 2708 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 21:40:01,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:01,644 INFO L93 Difference]: Finished difference Result 1603 states and 3683 transitions. [2022-03-15 21:40:01,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:40:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 28 [2022-03-15 21:40:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:01,646 INFO L225 Difference]: With dead ends: 1603 [2022-03-15 21:40:01,646 INFO L226 Difference]: Without dead ends: 1589 [2022-03-15 21:40:01,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3373 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1661, Invalid=8439, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 21:40:01,647 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 234 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:01,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 0 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:40:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1589 states. [2022-03-15 21:40:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1589 to 1030. [2022-03-15 21:40:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 2.5928085519922255) internal successors, (2668), 1029 states have internal predecessors, (2668), 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 21:40:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 2668 transitions. [2022-03-15 21:40:01,658 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 2668 transitions. Word has length 28 [2022-03-15 21:40:01,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:01,659 INFO L470 AbstractCegarLoop]: Abstraction has 1030 states and 2668 transitions. [2022-03-15 21:40:01,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 21:40:01,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 2668 transitions. [2022-03-15 21:40:01,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:40:01,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:01,660 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:01,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-03-15 21:40:01,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:01,860 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:01,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1551086217, now seen corresponding path program 152 times [2022-03-15 21:40:01,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:01,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358411870] [2022-03-15 21:40:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:01,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 43 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:02,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:02,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358411870] [2022-03-15 21:40:02,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358411870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:02,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866141066] [2022-03-15 21:40:02,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:40:02,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:02,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:02,077 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:02,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-15 21:40:02,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:40:02,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:02,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:40:02,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:02,741 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:02,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:03,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866141066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:03,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:03,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 62 [2022-03-15 21:40:03,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [535127055] [2022-03-15 21:40:03,381 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:03,382 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:03,386 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 60 transitions. [2022-03-15 21:40:03,387 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:03,919 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [353591#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 353589#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 353593#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 353595#(< j1 M1), 353506#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 353590#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 353592#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 353594#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6))] [2022-03-15 21:40:03,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:40:03,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:03,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:40:03,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=4188, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:40:03,920 INFO L87 Difference]: Start difference. First operand 1030 states and 2668 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 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 21:40:04,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:04,922 INFO L93 Difference]: Finished difference Result 1434 states and 3349 transitions. [2022-03-15 21:40:04,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:40:04,923 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 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 28 [2022-03-15 21:40:04,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:04,924 INFO L225 Difference]: With dead ends: 1434 [2022-03-15 21:40:04,924 INFO L226 Difference]: Without dead ends: 1418 [2022-03-15 21:40:04,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2985 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1440, Invalid=7872, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 21:40:04,925 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 249 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:04,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 0 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 576 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:40:04,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-03-15 21:40:04,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1012. [2022-03-15 21:40:04,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.5816023738872405) internal successors, (2610), 1011 states have internal predecessors, (2610), 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 21:40:04,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2610 transitions. [2022-03-15 21:40:04,935 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2610 transitions. Word has length 28 [2022-03-15 21:40:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:04,936 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 2610 transitions. [2022-03-15 21:40:04,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 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 21:40:04,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2610 transitions. [2022-03-15 21:40:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:40:04,940 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:04,940 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:04,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-15 21:40:05,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:05,155 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:05,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:05,155 INFO L85 PathProgramCache]: Analyzing trace with hash 702463745, now seen corresponding path program 153 times [2022-03-15 21:40:05,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:05,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464076525] [2022-03-15 21:40:05,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:05,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 44 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:05,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:05,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464076525] [2022-03-15 21:40:05,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464076525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:05,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084016442] [2022-03-15 21:40:05,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:40:05,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:05,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:05,381 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:05,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-15 21:40:05,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:40:05,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:05,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:40:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:05,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:06,640 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 36 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:06,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084016442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:06,640 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:06,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2022-03-15 21:40:06,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1932534601] [2022-03-15 21:40:06,640 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:06,641 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:06,653 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 21:40:06,653 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:07,250 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [357251#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 357339#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 357336#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 357337#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 357338#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 357334#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 357341#(< j1 M1), 357335#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 357340#(or (<= (+ 9 j2) M2) (<= counter 7) (<= M2 (+ 7 j2)))] [2022-03-15 21:40:07,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:40:07,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:07,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:40:07,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=712, Invalid=4400, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:40:07,251 INFO L87 Difference]: Start difference. First operand 1012 states and 2610 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 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 21:40:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:08,182 INFO L93 Difference]: Finished difference Result 1211 states and 2887 transitions. [2022-03-15 21:40:08,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:40:08,183 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 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 28 [2022-03-15 21:40:08,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:08,184 INFO L225 Difference]: With dead ends: 1211 [2022-03-15 21:40:08,184 INFO L226 Difference]: Without dead ends: 1193 [2022-03-15 21:40:08,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2975 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1234, Invalid=7138, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 21:40:08,185 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 213 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:08,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 0 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:40:08,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-03-15 21:40:08,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 934. [2022-03-15 21:40:08,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 2.5487674169346195) internal successors, (2378), 933 states have internal predecessors, (2378), 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 21:40:08,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 2378 transitions. [2022-03-15 21:40:08,194 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 2378 transitions. Word has length 28 [2022-03-15 21:40:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:08,194 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 2378 transitions. [2022-03-15 21:40:08,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 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 21:40:08,194 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 2378 transitions. [2022-03-15 21:40:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 21:40:08,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:08,195 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:08,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-15 21:40:08,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:08,395 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:08,396 INFO L85 PathProgramCache]: Analyzing trace with hash 164970889, now seen corresponding path program 154 times [2022-03-15 21:40:08,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:08,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348708361] [2022-03-15 21:40:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:08,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:08,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:08,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348708361] [2022-03-15 21:40:08,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348708361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:08,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500072543] [2022-03-15 21:40:08,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:40:08,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:08,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:08,648 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:08,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-15 21:40:08,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:40:08,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:08,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:40:08,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:09,222 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:09,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:09,983 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:09,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500072543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:09,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:09,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 64 [2022-03-15 21:40:09,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [58050790] [2022-03-15 21:40:09,984 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:09,985 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:09,990 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 68 transitions. [2022-03-15 21:40:09,990 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:10,678 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [360695#(or (<= (+ 9 j2) M2) (<= counter 7) (<= M2 (+ 7 j2))), 360691#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 360696#(or (<= M2 (+ j2 8)) (<= counter 8) (<= (+ j2 10) M2)), 360689#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 360688#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 360693#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 360697#(< j1 M1), 360692#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 360694#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 360690#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:40:10,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:40:10,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:10,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:40:10,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=4715, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:40:10,679 INFO L87 Difference]: Start difference. First operand 934 states and 2378 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 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 21:40:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:11,946 INFO L93 Difference]: Finished difference Result 1181 states and 2759 transitions. [2022-03-15 21:40:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:40:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 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 28 [2022-03-15 21:40:11,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:11,948 INFO L225 Difference]: With dead ends: 1181 [2022-03-15 21:40:11,948 INFO L226 Difference]: Without dead ends: 1143 [2022-03-15 21:40:11,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3663 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1864, Invalid=9266, Unknown=0, NotChecked=0, Total=11130 [2022-03-15 21:40:11,948 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 205 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:11,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 0 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:40:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-03-15 21:40:11,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 954. [2022-03-15 21:40:11,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 2.5477439664218258) internal successors, (2428), 953 states have internal predecessors, (2428), 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 21:40:11,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 2428 transitions. [2022-03-15 21:40:11,957 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 2428 transitions. Word has length 28 [2022-03-15 21:40:11,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:11,957 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 2428 transitions. [2022-03-15 21:40:11,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 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 21:40:11,957 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 2428 transitions. [2022-03-15 21:40:11,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:40:11,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:11,958 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:11,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-15 21:40:12,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:12,159 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:12,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:12,159 INFO L85 PathProgramCache]: Analyzing trace with hash 254897854, now seen corresponding path program 155 times [2022-03-15 21:40:12,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:12,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042128184] [2022-03-15 21:40:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:12,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:12,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:12,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:12,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042128184] [2022-03-15 21:40:12,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042128184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:12,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388439882] [2022-03-15 21:40:12,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:40:12,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:12,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:12,381 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:12,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-15 21:40:12,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:40:12,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:12,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:40:12,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:12,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:13,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388439882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:13,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:13,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 67 [2022-03-15 21:40:13,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1823877697] [2022-03-15 21:40:13,681 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:13,682 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:13,689 INFO L252 McrAutomatonBuilder]: Finished intersection with 64 states and 97 transitions. [2022-03-15 21:40:13,689 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:14,631 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 23 new interpolants: [364101#(or (<= (+ j2 11) M2) (< (+ 5 j1) M1) (<= M1 (+ j1 4))), 364094#(or (<= (+ 9 j2) M2) (< j1 M1)), 364089#(or (< j1 M1) (<= (+ j2 4) M2)), 364105#(or (< (+ 9 j1) M1) (<= (+ j2 11) M2) (<= M1 (+ j1 8))), 364099#(or (<= M1 (+ 2 j1)) (<= (+ j2 11) M2) (< (+ 3 j1) M1)), 364085#(< j1 M1), 364087#(or (< j1 M1) (<= (+ 2 j2) M2)), 364107#(or (< (+ j1 11) M1) (<= (+ j2 11) M2) (<= M1 (+ j1 10))), 364104#(or (<= (+ j2 11) M2) (< (+ j1 8) M1) (<= M1 (+ 7 j1))), 364102#(or (<= (+ j2 11) M2) (<= M1 (+ 5 j1)) (< (+ 6 j1) M1)), 364097#(or (<= (+ j2 11) M2) (< (+ j1 1) M1) (<= M1 j1)), 364100#(or (<= M1 (+ 3 j1)) (<= (+ j2 11) M2) (< (+ j1 4) M1)), 364106#(or (< (+ j1 10) M1) (<= (+ j2 11) M2) (<= M1 (+ 9 j1))), 364092#(or (<= (+ 7 j2) M2) (< j1 M1)), 364103#(or (<= (+ j2 11) M2) (< (+ 7 j1) M1) (<= M1 (+ 6 j1))), 364098#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ j2 11) M2)), 364093#(or (< j1 M1) (<= (+ j2 8) M2)), 364095#(or (< j1 M1) (<= (+ j2 10) M2)), 364090#(or (< j1 M1) (<= (+ 5 j2) M2)), 364091#(or (<= (+ 6 j2) M2) (< j1 M1)), 364086#(or (< j1 M1) (<= (+ j2 1) M2)), 364096#(or (< j1 M1) (<= (+ j2 11) M2)), 364088#(or (< j1 M1) (<= (+ 3 j2) M2))] [2022-03-15 21:40:14,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 21:40:14,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:14,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 21:40:14,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1411, Invalid=6779, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 21:40:14,632 INFO L87 Difference]: Start difference. First operand 954 states and 2428 transitions. Second operand has 48 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 47 states have internal predecessors, (86), 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 21:40:15,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:15,874 INFO L93 Difference]: Finished difference Result 1311 states and 3026 transitions. [2022-03-15 21:40:15,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 21:40:15,875 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 47 states have internal predecessors, (86), 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 29 [2022-03-15 21:40:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:15,876 INFO L225 Difference]: With dead ends: 1311 [2022-03-15 21:40:15,876 INFO L226 Difference]: Without dead ends: 1239 [2022-03-15 21:40:15,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6328 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3800, Invalid=13756, Unknown=0, NotChecked=0, Total=17556 [2022-03-15 21:40:15,877 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 221 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:15,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 0 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:40:15,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2022-03-15 21:40:15,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 949. [2022-03-15 21:40:15,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.5411392405063293) internal successors, (2409), 948 states have internal predecessors, (2409), 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 21:40:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2409 transitions. [2022-03-15 21:40:15,887 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2409 transitions. Word has length 29 [2022-03-15 21:40:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:15,887 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 2409 transitions. [2022-03-15 21:40:15,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7916666666666667) internal successors, (86), 47 states have internal predecessors, (86), 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 21:40:15,887 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2409 transitions. [2022-03-15 21:40:15,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 21:40:15,888 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:15,888 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:15,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-03-15 21:40:16,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-15 21:40:16,104 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:16,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:16,104 INFO L85 PathProgramCache]: Analyzing trace with hash -84557010, now seen corresponding path program 156 times [2022-03-15 21:40:16,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:16,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057844503] [2022-03-15 21:40:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:16,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:16,236 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:16,236 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:16,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057844503] [2022-03-15 21:40:16,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057844503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:16,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032464371] [2022-03-15 21:40:16,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:40:16,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:16,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:16,237 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:16,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-15 21:40:16,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:40:16,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:16,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:40:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 56 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:16,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:17,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032464371] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:17,533 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:17,533 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 23, 23] total 56 [2022-03-15 21:40:17,533 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1937798489] [2022-03-15 21:40:17,533 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:17,534 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:17,539 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 55 transitions. [2022-03-15 21:40:17,539 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:17,921 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [367627#(and (or (<= M1 (+ j1 1)) (<= (+ j2 8) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 367628#(and (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M1 (+ 2 j1)) (<= (+ 7 j2) j1))), 367630#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 4))) (or (<= (+ 5 j2) j1) (<= M1 (+ j1 4)))), 367631#(< j2 M2), 367629#(and (or (<= M1 (+ 3 j1)) (<= (+ 6 j2) j1)) (or (<= M1 (+ 3 j1)) (= (+ (* (- 1) M1) M2) 0))), 367636#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 9 j1))) (or (<= j2 j1) (<= M1 (+ 9 j1)))), 367635#(and (or (<= M1 (+ j1 8)) (<= (+ j2 1) j1)) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 8)))), 367626#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1)) (or (<= (+ 9 j2) j1) (<= M1 j1))), 367632#(and (or (<= (+ j2 4) j1) (<= M1 (+ 5 j1))) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 5 j1)))), 367634#(and (or (<= (+ 2 j2) j1) (<= M1 (+ 7 j1))) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 7 j1)))), 367633#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 6 j1))) (or (<= (+ 3 j2) j1) (<= M1 (+ 6 j1))))] [2022-03-15 21:40:17,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:40:17,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:17,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:40:17,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=3558, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:40:17,922 INFO L87 Difference]: Start difference. First operand 949 states and 2409 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 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 21:40:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:18,481 INFO L93 Difference]: Finished difference Result 1069 states and 2622 transitions. [2022-03-15 21:40:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:40:18,481 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 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 29 [2022-03-15 21:40:18,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:18,482 INFO L225 Difference]: With dead ends: 1069 [2022-03-15 21:40:18,482 INFO L226 Difference]: Without dead ends: 1068 [2022-03-15 21:40:18,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3027 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2377, Invalid=7325, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 21:40:18,483 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:18,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:40:18,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-03-15 21:40:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 949. [2022-03-15 21:40:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 948 states have (on average 2.540084388185654) internal successors, (2408), 948 states have internal predecessors, (2408), 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 21:40:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 2408 transitions. [2022-03-15 21:40:18,492 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 2408 transitions. Word has length 29 [2022-03-15 21:40:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:18,492 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 2408 transitions. [2022-03-15 21:40:18,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 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 21:40:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 2408 transitions. [2022-03-15 21:40:18,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:40:18,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:18,493 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:18,508 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-15 21:40:18,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-15 21:40:18,693 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:18,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:18,694 INFO L85 PathProgramCache]: Analyzing trace with hash -688243521, now seen corresponding path program 157 times [2022-03-15 21:40:18,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:18,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675110157] [2022-03-15 21:40:18,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:18,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:18,836 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:18,836 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:18,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675110157] [2022-03-15 21:40:18,836 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675110157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:18,836 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948060163] [2022-03-15 21:40:18,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:40:18,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:18,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:18,837 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:18,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-15 21:40:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:18,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:40:18,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:18,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 66 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:19,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948060163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:19,692 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:19,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 23] total 34 [2022-03-15 21:40:19,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [749518106] [2022-03-15 21:40:19,692 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:19,693 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:19,701 INFO L252 McrAutomatonBuilder]: Finished intersection with 67 states and 102 transitions. [2022-03-15 21:40:19,701 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:20,219 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:40:20,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:40:20,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:20,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:40:20,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:40:20,220 INFO L87 Difference]: Start difference. First operand 949 states and 2408 transitions. Second operand has 15 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 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 21:40:20,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:20,592 INFO L93 Difference]: Finished difference Result 1328 states and 3207 transitions. [2022-03-15 21:40:20,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:40:20,593 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 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 30 [2022-03-15 21:40:20,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:20,594 INFO L225 Difference]: With dead ends: 1328 [2022-03-15 21:40:20,594 INFO L226 Difference]: Without dead ends: 1300 [2022-03-15 21:40:20,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:40:20,595 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 40 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:20,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 0 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:40:20,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-03-15 21:40:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1104. [2022-03-15 21:40:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 2.5757026291931098) internal successors, (2841), 1103 states have internal predecessors, (2841), 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 21:40:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 2841 transitions. [2022-03-15 21:40:20,604 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 2841 transitions. Word has length 30 [2022-03-15 21:40:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:20,604 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 2841 transitions. [2022-03-15 21:40:20,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.5) internal successors, (63), 14 states have internal predecessors, (63), 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 21:40:20,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 2841 transitions. [2022-03-15 21:40:20,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:40:20,605 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:20,605 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:20,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-15 21:40:20,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-15 21:40:20,806 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:20,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:20,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1531155429, now seen corresponding path program 158 times [2022-03-15 21:40:20,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:20,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090221195] [2022-03-15 21:40:20,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:20,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:21,086 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:21,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:21,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090221195] [2022-03-15 21:40:21,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090221195] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:21,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721426056] [2022-03-15 21:40:21,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:40:21,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:21,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:21,088 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:21,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-15 21:40:21,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:40:21,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:21,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-15 21:40:21,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:21,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:25,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721426056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:25,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:25,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 61 [2022-03-15 21:40:25,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1460240311] [2022-03-15 21:40:25,934 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:25,935 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:25,941 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 56 transitions. [2022-03-15 21:40:25,941 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:26,747 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [374654#(and (or (<= counter 3) (not (< (+ 6 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= 3 counter) (not (< (+ 6 j1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ 6 j1) M1)))), 374652#(and (or (not (< (+ j1 4) M1)) (<= 5 counter)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= counter 5)) (or (not (< (+ j1 4) M1)) (<= (+ 5 j2) j1))), 374656#(and (or (not (< (+ j1 8) M1)) (<= counter 1)) (or (not (< (+ j1 8) M1)) (<= 1 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 8) M1))) (or (not (< (+ j1 8) M1)) (<= (+ j2 1) j1))), 374651#(and (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ 6 j2) j1)) (or (not (< (+ 3 j1) M1)) (<= counter 6)) (or (<= 6 counter) (not (< (+ 3 j1) M1)))), 374659#(or (< (+ j1 1) M1) (<= M1 j1)), 374655#(and (or (not (< (+ 7 j1) M1)) (<= 2 counter)) (or (not (< (+ 7 j1) M1)) (<= counter 2)) (or (not (< (+ 7 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 7 j1) M1)) (<= (+ 2 j2) j1))), 374658#(< j1 M1), 374653#(and (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ j2 4) j1)) (or (<= counter 4) (not (< (+ 5 j1) M1))) (or (not (< (+ 5 j1) M1)) (<= 4 counter))), 374657#(and (or (<= counter 0) (not (< (+ 9 j1) M1))) (or (<= 0 counter) (not (< (+ 9 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 9 j1) M1))) (or (<= j2 j1) (not (< (+ 9 j1) M1)))), 374649#(and (or (<= (+ j2 8) j1) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 8 counter)) (or (<= counter 8) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 374648#(and (or (not (< j1 M1)) (<= (+ 9 j2) j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 9)) (or (not (< j1 M1)) (<= 9 counter))), 374650#(and (or (not (< (+ 2 j1) M1)) (<= 7 counter)) (or (<= (+ 7 j2) j1) (not (< (+ 2 j1) M1))) (or (<= counter 7) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))))] [2022-03-15 21:40:26,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:40:26,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:26,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:40:26,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1054, Invalid=4348, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:40:26,748 INFO L87 Difference]: Start difference. First operand 1104 states and 2841 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 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 21:40:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:30,257 INFO L93 Difference]: Finished difference Result 1852 states and 4242 transitions. [2022-03-15 21:40:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 21:40:30,257 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 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 30 [2022-03-15 21:40:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:30,259 INFO L225 Difference]: With dead ends: 1852 [2022-03-15 21:40:30,259 INFO L226 Difference]: Without dead ends: 1849 [2022-03-15 21:40:30,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2376, Invalid=9614, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 21:40:30,260 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 240 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:30,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 0 Invalid, 1886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1646 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:40:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1849 states. [2022-03-15 21:40:30,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1849 to 1095. [2022-03-15 21:40:30,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1094 states have (on average 2.582266910420475) internal successors, (2825), 1094 states have internal predecessors, (2825), 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 21:40:30,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 2825 transitions. [2022-03-15 21:40:30,272 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 2825 transitions. Word has length 30 [2022-03-15 21:40:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:30,272 INFO L470 AbstractCegarLoop]: Abstraction has 1095 states and 2825 transitions. [2022-03-15 21:40:30,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 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 21:40:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 2825 transitions. [2022-03-15 21:40:30,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:40:30,273 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:30,273 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:30,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-15 21:40:30,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:30,473 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:30,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:30,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1820478557, now seen corresponding path program 159 times [2022-03-15 21:40:30,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:30,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639189664] [2022-03-15 21:40:30,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:30,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:30,731 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:30,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639189664] [2022-03-15 21:40:30,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639189664] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:30,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370076148] [2022-03-15 21:40:30,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:40:30,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:30,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:30,732 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:30,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-15 21:40:30,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:40:30,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:30,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-15 21:40:30,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:31,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 1 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:35,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370076148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:35,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:35,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 24] total 62 [2022-03-15 21:40:35,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [980180736] [2022-03-15 21:40:35,148 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:35,150 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:35,155 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 56 transitions. [2022-03-15 21:40:35,155 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:35,892 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [379016#(and (or (not (< (+ 5 j1) M1)) (<= 3 counter)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= counter 3)) (or (not (< (+ 5 j1) M1)) (<= (+ 3 j2) j1))), 379012#(and (or (not (< (+ j1 1) M1)) (<= 7 counter)) (or (<= counter 7) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= (+ 7 j2) j1) (not (< (+ j1 1) M1)))), 379011#(and (or (not (< j1 M1)) (<= counter 8)) (or (not (< j1 M1)) (<= 8 counter)) (or (not (< j1 M1)) (<= (+ j2 8) j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 379013#(and (or (not (< (+ 2 j1) M1)) (<= counter 6)) (or (<= (+ 6 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 6 counter) (not (< (+ 2 j1) M1)))), 379017#(and (or (<= 2 counter) (not (< (+ 6 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ 6 j1) M1))) (or (<= counter 2) (not (< (+ 6 j1) M1)))), 379015#(and (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter 4) (not (< (+ j1 4) M1))) (or (not (< (+ j1 4) M1)) (<= (+ j2 4) j1)) (or (not (< (+ j1 4) M1)) (<= 4 counter))), 379018#(and (or (not (< (+ 7 j1) M1)) (<= 1 counter)) (or (not (< (+ 7 j1) M1)) (<= counter 1)) (or (not (< (+ 7 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 7 j1) M1)) (= (+ (* (- 1) M1) M2) 0))), 379019#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 379021#(and (or (not (< (+ j1 8) M1)) (<= 0 counter)) (or (<= j2 j1) (not (< (+ j1 8) M1))) (or (<= counter 0) (not (< (+ j1 8) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 8) M1)))), 379014#(and (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= counter 5)) (or (not (< (+ 3 j1) M1)) (<= 5 counter)) (or (not (< (+ 3 j1) M1)) (<= (+ 5 j2) j1))), 379020#(< j1 M1)] [2022-03-15 21:40:35,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:40:35,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:35,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:40:35,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=983, Invalid=4419, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:40:35,893 INFO L87 Difference]: Start difference. First operand 1095 states and 2825 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 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 21:40:42,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:42,974 INFO L93 Difference]: Finished difference Result 2900 states and 6123 transitions. [2022-03-15 21:40:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-15 21:40:42,975 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 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 30 [2022-03-15 21:40:42,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:42,977 INFO L225 Difference]: With dead ends: 2900 [2022-03-15 21:40:42,978 INFO L226 Difference]: Without dead ends: 2896 [2022-03-15 21:40:42,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4896 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=4395, Invalid=20097, Unknown=0, NotChecked=0, Total=24492 [2022-03-15 21:40:42,978 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 458 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:42,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [458 Valid, 0 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:40:42,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2022-03-15 21:40:42,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 1086. [2022-03-15 21:40:42,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.5861751152073733) internal successors, (2806), 1085 states have internal predecessors, (2806), 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 21:40:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2806 transitions. [2022-03-15 21:40:42,994 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2806 transitions. Word has length 30 [2022-03-15 21:40:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:42,994 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2806 transitions. [2022-03-15 21:40:42,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 28 states have internal predecessors, (54), 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 21:40:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2806 transitions. [2022-03-15 21:40:42,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:40:42,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:42,995 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:43,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Forceful destruction successful, exit code 0 [2022-03-15 21:40:43,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:43,196 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:43,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1262767131, now seen corresponding path program 160 times [2022-03-15 21:40:43,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:43,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819327363] [2022-03-15 21:40:43,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:43,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:43,462 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 3 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:43,462 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:43,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819327363] [2022-03-15 21:40:43,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819327363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:43,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480923997] [2022-03-15 21:40:43,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:40:43,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:43,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:43,463 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:43,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-15 21:40:43,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:40:43,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:43,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-15 21:40:43,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 3 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:44,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:47,267 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 3 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:47,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480923997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:47,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:47,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 24] total 65 [2022-03-15 21:40:47,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [44555798] [2022-03-15 21:40:47,267 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:47,269 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:47,274 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 58 transitions. [2022-03-15 21:40:47,274 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:48,044 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [384502#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 384504#(and (or (<= 5 counter) (not (< (+ 2 j1) M1))) (or (<= counter 5) (not (< (+ 2 j1) M1))) (or (<= (+ 5 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 384507#(and (or (not (< (+ 5 j1) M1)) (<= counter 2)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ 5 j1) M1)) (<= 2 counter))), 384510#(< j1 M1), 384503#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 384508#(and (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= counter 1) (not (< (+ 6 j1) M1))) (or (<= 1 counter) (not (< (+ 6 j1) M1))) (or (not (< (+ 6 j1) M1)) (<= (+ j2 1) j1))), 384506#(and (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 3 counter)) (or (not (< (+ j1 4) M1)) (<= counter 3)) (or (not (< (+ j1 4) M1)) (<= (+ 3 j2) j1))), 384509#(and (or (not (< (+ 7 j1) M1)) (<= counter 0)) (or (not (< (+ 7 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 7 j1) M1)) (<= j2 j1)) (or (not (< (+ 7 j1) M1)) (<= 0 counter))), 384500#(and (or (not (< j1 M1)) (<= counter 7)) (or (<= (+ 7 j2) j1) (not (< j1 M1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 7 counter))), 384505#(and (or (not (< (+ 3 j1) M1)) (<= (+ j2 4) j1)) (or (<= counter 4) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= 4 counter))), 384501#(and (or (not (< (+ j1 1) M1)) (<= counter 6)) (or (<= (+ 6 j2) j1) (not (< (+ j1 1) M1))) (or (<= 6 counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 21:40:48,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:40:48,045 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:48,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:40:48,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=960, Invalid=4892, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:40:48,045 INFO L87 Difference]: Start difference. First operand 1086 states and 2806 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 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 21:40:54,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:54,805 INFO L93 Difference]: Finished difference Result 3243 states and 6736 transitions. [2022-03-15 21:40:54,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-15 21:40:54,805 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 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 30 [2022-03-15 21:40:54,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:54,808 INFO L225 Difference]: With dead ends: 3243 [2022-03-15 21:40:54,808 INFO L226 Difference]: Without dead ends: 3237 [2022-03-15 21:40:54,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5871 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=4754, Invalid=22306, Unknown=0, NotChecked=0, Total=27060 [2022-03-15 21:40:54,809 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 457 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1279 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:54,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 0 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1279 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:40:54,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3237 states. [2022-03-15 21:40:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3237 to 1086. [2022-03-15 21:40:54,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.589861751152074) internal successors, (2810), 1085 states have internal predecessors, (2810), 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 21:40:54,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2810 transitions. [2022-03-15 21:40:54,825 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2810 transitions. Word has length 30 [2022-03-15 21:40:54,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:54,825 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2810 transitions. [2022-03-15 21:40:54,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 29 states have internal predecessors, (55), 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 21:40:54,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2810 transitions. [2022-03-15 21:40:54,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:40:54,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:54,826 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:54,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-15 21:40:55,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:55,027 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:55,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:55,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1051718051, now seen corresponding path program 161 times [2022-03-15 21:40:55,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:55,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339428111] [2022-03-15 21:40:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:55,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:55,282 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:55,282 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:55,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339428111] [2022-03-15 21:40:55,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339428111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:55,282 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207622384] [2022-03-15 21:40:55,282 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:40:55,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:55,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:55,283 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:40:55,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-15 21:40:55,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 21:40:55,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:55,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-15 21:40:55,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:55,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 6 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:58,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207622384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:58,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:58,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 64 [2022-03-15 21:40:58,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [741439145] [2022-03-15 21:40:58,569 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:58,571 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:58,576 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 60 transitions. [2022-03-15 21:40:58,577 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:59,328 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [390343#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 390344#(and (or (not (< j1 M1)) (<= (+ 6 j2) j1)) (or (<= 6 counter) (not (< j1 M1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 6))), 390346#(and (or (<= (+ j2 4) j1) (not (< (+ 2 j1) M1))) (or (<= counter 4) (not (< (+ 2 j1) M1))) (or (not (< (+ 2 j1) M1)) (<= 4 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 390345#(and (or (<= counter 5) (not (< (+ j1 1) M1))) (or (<= (+ 5 j2) j1) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 5 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 390351#(and (or (<= j2 j1) (not (< (+ 6 j1) M1))) (or (<= counter 0) (not (< (+ 6 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= 0 counter) (not (< (+ 6 j1) M1)))), 390347#(and (or (not (< (+ 3 j1) M1)) (<= (+ 3 j2) j1)) (or (not (< (+ 3 j1) M1)) (<= 3 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= counter 3))), 390348#(and (or (not (< (+ j1 4) M1)) (<= counter 2)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ j1 4) M1)) (<= 2 counter))), 390349#(and (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 5 j1) M1)) (<= 1 counter)) (or (not (< (+ 5 j1) M1)) (<= counter 1))), 390350#(< j1 M1), 390342#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 390341#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:40:59,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:40:59,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:59,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:40:59,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=898, Invalid=4802, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:40:59,329 INFO L87 Difference]: Start difference. First operand 1086 states and 2810 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 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 21:41:05,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:05,024 INFO L93 Difference]: Finished difference Result 3583 states and 7324 transitions. [2022-03-15 21:41:05,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 21:41:05,024 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 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 30 [2022-03-15 21:41:05,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:05,028 INFO L225 Difference]: With dead ends: 3583 [2022-03-15 21:41:05,028 INFO L226 Difference]: Without dead ends: 3575 [2022-03-15 21:41:05,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5991 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=4565, Invalid=21195, Unknown=0, NotChecked=0, Total=25760 [2022-03-15 21:41:05,029 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 425 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 331 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 331 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:05,029 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [425 Valid, 0 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [331 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:41:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2022-03-15 21:41:05,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 1081. [2022-03-15 21:41:05,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 2.588888888888889) internal successors, (2796), 1080 states have internal predecessors, (2796), 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 21:41:05,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 2796 transitions. [2022-03-15 21:41:05,049 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 2796 transitions. Word has length 30 [2022-03-15 21:41:05,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:05,049 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 2796 transitions. [2022-03-15 21:41:05,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 30 states have internal predecessors, (56), 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 21:41:05,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 2796 transitions. [2022-03-15 21:41:05,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:41:05,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:05,051 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:05,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-03-15 21:41:05,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:05,262 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:05,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1342729243, now seen corresponding path program 162 times [2022-03-15 21:41:05,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:05,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294926559] [2022-03-15 21:41:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:05,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:05,519 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:05,519 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:05,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294926559] [2022-03-15 21:41:05,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294926559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:05,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850449456] [2022-03-15 21:41:05,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:41:05,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:05,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:05,520 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:41:05,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-15 21:41:05,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-15 21:41:05,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:05,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 21:41:05,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:06,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:08,284 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 10 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:08,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850449456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:08,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:08,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 65 [2022-03-15 21:41:08,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [558045696] [2022-03-15 21:41:08,285 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:08,286 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:08,292 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 62 transitions. [2022-03-15 21:41:08,292 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:09,078 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [396507#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 396508#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 396515#(and (or (not (< (+ 5 j1) M1)) (<= j2 j1)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= counter 0)) (or (not (< (+ 5 j1) M1)) (<= 0 counter))), 396516#(< j1 M1), 396416#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 396512#(and (or (not (< (+ 3 j1) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= 2 counter)) (or (not (< (+ 3 j1) M1)) (<= counter 2))), 396510#(and (or (<= counter 4) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 4 counter)) (or (<= (+ j2 4) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 396511#(and (or (<= counter 3) (not (< (+ 2 j1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 3 counter) (not (< (+ 2 j1) M1)))), 396509#(and (or (not (< j1 M1)) (<= counter 5)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 5 counter)) (or (not (< j1 M1)) (<= (+ 5 j2) j1))), 396513#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 396514#(and (or (not (< (+ j1 4) M1)) (<= 1 counter)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= (+ j2 1) j1)) (or (not (< (+ j1 4) M1)) (<= counter 1)))] [2022-03-15 21:41:09,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:41:09,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:09,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:41:09,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=884, Invalid=4816, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:41:09,079 INFO L87 Difference]: Start difference. First operand 1081 states and 2796 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 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 21:41:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:13,827 INFO L93 Difference]: Finished difference Result 3953 states and 7978 transitions. [2022-03-15 21:41:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 21:41:13,827 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 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 30 [2022-03-15 21:41:13,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:13,831 INFO L225 Difference]: With dead ends: 3953 [2022-03-15 21:41:13,831 INFO L226 Difference]: Without dead ends: 3935 [2022-03-15 21:41:13,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5488 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=4074, Invalid=18576, Unknown=0, NotChecked=0, Total=22650 [2022-03-15 21:41:13,832 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 396 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:13,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 0 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:41:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3935 states. [2022-03-15 21:41:13,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3935 to 1072. [2022-03-15 21:41:13,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 2.5901027077497667) internal successors, (2774), 1071 states have internal predecessors, (2774), 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 21:41:13,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 2774 transitions. [2022-03-15 21:41:13,850 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 2774 transitions. Word has length 30 [2022-03-15 21:41:13,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:13,850 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 2774 transitions. [2022-03-15 21:41:13,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 31 states have internal predecessors, (57), 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 21:41:13,851 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 2774 transitions. [2022-03-15 21:41:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:41:13,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:13,852 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:13,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-15 21:41:14,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:14,052 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:14,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1794043811, now seen corresponding path program 163 times [2022-03-15 21:41:14,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:14,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977346167] [2022-03-15 21:41:14,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:14,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:14,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:14,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:14,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977346167] [2022-03-15 21:41:14,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977346167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:14,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862226614] [2022-03-15 21:41:14,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:41:14,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:14,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:14,310 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:41:14,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-15 21:41:14,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:14,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 21:41:14,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:15,024 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:15,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:16,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862226614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:16,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:16,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 68 [2022-03-15 21:41:16,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1916562076] [2022-03-15 21:41:16,761 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:16,762 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:16,768 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 64 transitions. [2022-03-15 21:41:16,768 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:17,511 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [403010#(and (or (not (< j1 M1)) (<= 4 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter 4) (not (< j1 M1))) (or (not (< j1 M1)) (<= (+ j2 4) j1))), 403007#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 403008#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 403015#(and (or (not (< (+ 3 j1) M1)) (<= counter 1)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 3 j1) M1)) (<= 1 counter))), 403016#(< j1 M1), 403013#(and (or (<= counter 3) (not (< (+ j1 1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ j1 1) M1))) (or (<= 3 counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 403011#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 403012#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 403017#(and (or (not (< (+ j1 4) M1)) (<= counter 0)) (or (not (< (+ j1 4) M1)) (<= j2 j1)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 0 counter))), 403014#(and (or (<= (+ 2 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 2 counter) (not (< (+ 2 j1) M1))) (or (<= counter 2) (not (< (+ 2 j1) M1)))), 403009#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:41:17,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:41:17,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:17,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:41:17,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=940, Invalid=5380, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:41:17,512 INFO L87 Difference]: Start difference. First operand 1072 states and 2774 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 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 21:41:20,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:20,897 INFO L93 Difference]: Finished difference Result 4238 states and 8482 transitions. [2022-03-15 21:41:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 21:41:20,898 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 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 30 [2022-03-15 21:41:20,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:20,902 INFO L225 Difference]: With dead ends: 4238 [2022-03-15 21:41:20,902 INFO L226 Difference]: Without dead ends: 4196 [2022-03-15 21:41:20,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4606 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3129, Invalid=15231, Unknown=0, NotChecked=0, Total=18360 [2022-03-15 21:41:20,903 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 280 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:20,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 0 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:41:20,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2022-03-15 21:41:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 1072. [2022-03-15 21:41:20,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 2.5901027077497667) internal successors, (2774), 1071 states have internal predecessors, (2774), 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 21:41:20,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 2774 transitions. [2022-03-15 21:41:20,922 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 2774 transitions. Word has length 30 [2022-03-15 21:41:20,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:20,922 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 2774 transitions. [2022-03-15 21:41:20,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 32 states have internal predecessors, (58), 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 21:41:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 2774 transitions. [2022-03-15 21:41:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:41:20,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:20,923 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:20,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-03-15 21:41:21,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:21,124 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash 334719341, now seen corresponding path program 164 times [2022-03-15 21:41:21,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:21,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943444863] [2022-03-15 21:41:21,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:21,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:21,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 20 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:21,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:21,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943444863] [2022-03-15 21:41:21,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943444863] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:21,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003856133] [2022-03-15 21:41:21,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:41:21,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:21,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:21,371 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:41:21,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-15 21:41:21,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:41:21,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:21,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-15 21:41:21,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:22,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:23,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003856133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:23,429 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:23,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 66 [2022-03-15 21:41:23,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [254427937] [2022-03-15 21:41:23,430 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:23,431 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:23,436 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 62 transitions. [2022-03-15 21:41:23,437 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:24,147 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [409662#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 409757#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter 3)) (or (not (< j1 M1)) (<= 3 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 409759#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ 2 j1) M1))) (or (<= 1 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 409756#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 409754#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 409758#(and (or (<= 2 counter) (not (< (+ j1 1) M1))) (or (<= counter 2) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 409761#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 409755#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 409760#(< j1 M1), 409753#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:41:24,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:41:24,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:24,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:41:24,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=835, Invalid=4865, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:41:24,148 INFO L87 Difference]: Start difference. First operand 1072 states and 2774 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 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 21:41:26,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:26,635 INFO L93 Difference]: Finished difference Result 3586 states and 7413 transitions. [2022-03-15 21:41:26,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-15 21:41:26,635 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 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 30 [2022-03-15 21:41:26,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:26,639 INFO L225 Difference]: With dead ends: 3586 [2022-03-15 21:41:26,639 INFO L226 Difference]: Without dead ends: 3550 [2022-03-15 21:41:26,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3821 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2386, Invalid=11894, Unknown=0, NotChecked=0, Total=14280 [2022-03-15 21:41:26,640 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 260 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:26,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 0 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:41:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2022-03-15 21:41:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 1168. [2022-03-15 21:41:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.586975149957155) internal successors, (3019), 1167 states have internal predecessors, (3019), 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 21:41:26,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3019 transitions. [2022-03-15 21:41:26,657 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3019 transitions. Word has length 30 [2022-03-15 21:41:26,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:26,657 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 3019 transitions. [2022-03-15 21:41:26,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 31 states have internal predecessors, (56), 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 21:41:26,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3019 transitions. [2022-03-15 21:41:26,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:41:26,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:26,658 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:26,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-15 21:41:26,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2022-03-15 21:41:26,859 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:26,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:26,859 INFO L85 PathProgramCache]: Analyzing trace with hash -551078939, now seen corresponding path program 165 times [2022-03-15 21:41:26,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:26,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119005780] [2022-03-15 21:41:26,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:26,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:27,118 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:27,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119005780] [2022-03-15 21:41:27,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119005780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:27,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245674809] [2022-03-15 21:41:27,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:41:27,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:27,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:27,120 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:41:27,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-15 21:41:27,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:41:27,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:27,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 21:41:27,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:27,859 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:27,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:29,335 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:29,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245674809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:29,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:29,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 69 [2022-03-15 21:41:29,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [150778940] [2022-03-15 21:41:29,335 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:29,337 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:29,342 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 66 transitions. [2022-03-15 21:41:29,342 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:30,106 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [416021#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 416023#(and (or (<= 2 counter) (not (< (+ j1 1) M1))) (or (<= counter 2) (not (< (+ j1 1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 416024#(and (or (not (< (+ 2 j1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ 2 j1) M1))) (or (<= 1 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 416025#(< j1 M1), 416016#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 416019#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 416020#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 416022#(and (or (not (< j1 M1)) (<= (+ 3 j2) j1)) (or (not (< j1 M1)) (<= counter 3)) (or (not (< j1 M1)) (<= 3 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 416026#(and (or (not (< (+ 3 j1) M1)) (<= 0 counter)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= j2 j1) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (<= counter 0))), 416017#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 416018#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:41:30,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:41:30,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:30,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:41:30,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=947, Invalid=5533, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:41:30,107 INFO L87 Difference]: Start difference. First operand 1168 states and 3019 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 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 21:41:33,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:33,452 INFO L93 Difference]: Finished difference Result 3385 states and 6852 transitions. [2022-03-15 21:41:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 21:41:33,452 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 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 30 [2022-03-15 21:41:33,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:33,455 INFO L225 Difference]: With dead ends: 3385 [2022-03-15 21:41:33,455 INFO L226 Difference]: Without dead ends: 3335 [2022-03-15 21:41:33,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5440 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3591, Invalid=17289, Unknown=0, NotChecked=0, Total=20880 [2022-03-15 21:41:33,456 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 299 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:33,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 0 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:41:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2022-03-15 21:41:33,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 1077. [2022-03-15 21:41:33,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1077 states, 1076 states have (on average 2.587360594795539) internal successors, (2784), 1076 states have internal predecessors, (2784), 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 21:41:33,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1077 states to 1077 states and 2784 transitions. [2022-03-15 21:41:33,472 INFO L78 Accepts]: Start accepts. Automaton has 1077 states and 2784 transitions. Word has length 30 [2022-03-15 21:41:33,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:33,472 INFO L470 AbstractCegarLoop]: Abstraction has 1077 states and 2784 transitions. [2022-03-15 21:41:33,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 33 states have internal predecessors, (59), 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 21:41:33,472 INFO L276 IsEmpty]: Start isEmpty. Operand 1077 states and 2784 transitions. [2022-03-15 21:41:33,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:41:33,473 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:33,473 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:33,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Forceful destruction successful, exit code 0 [2022-03-15 21:41:33,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-15 21:41:33,676 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:33,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:33,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2066676949, now seen corresponding path program 166 times [2022-03-15 21:41:33,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:33,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125604215] [2022-03-15 21:41:33,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:33,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 25 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:33,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:33,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125604215] [2022-03-15 21:41:33,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125604215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:33,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840700083] [2022-03-15 21:41:33,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:41:33,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:33,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:33,927 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:41:33,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-15 21:41:33,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:41:33,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:33,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-15 21:41:33,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:34,661 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:34,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:35,844 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:35,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840700083] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:35,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:35,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 67 [2022-03-15 21:41:35,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1759863475] [2022-03-15 21:41:35,844 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:35,846 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:35,851 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 56 transitions. [2022-03-15 21:41:35,851 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:36,372 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [421943#(< j1 M1), 421936#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 421938#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 421937#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 421939#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 421940#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 421941#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 421942#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1))))] [2022-03-15 21:41:36,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:41:36,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:36,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:41:36,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=837, Invalid=4863, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:41:36,373 INFO L87 Difference]: Start difference. First operand 1077 states and 2784 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 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 21:41:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:40,146 INFO L93 Difference]: Finished difference Result 4675 states and 9394 transitions. [2022-03-15 21:41:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-15 21:41:40,146 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 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 30 [2022-03-15 21:41:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:40,152 INFO L225 Difference]: With dead ends: 4675 [2022-03-15 21:41:40,152 INFO L226 Difference]: Without dead ends: 4651 [2022-03-15 21:41:40,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6288 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4190, Invalid=18460, Unknown=0, NotChecked=0, Total=22650 [2022-03-15 21:41:40,154 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 254 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:40,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 0 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:41:40,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4651 states. [2022-03-15 21:41:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4651 to 1314. [2022-03-15 21:41:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1313 states have (on average 2.6367098248286367) internal successors, (3462), 1313 states have internal predecessors, (3462), 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 21:41:40,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 3462 transitions. [2022-03-15 21:41:40,190 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 3462 transitions. Word has length 30 [2022-03-15 21:41:40,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:40,190 INFO L470 AbstractCegarLoop]: Abstraction has 1314 states and 3462 transitions. [2022-03-15 21:41:40,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 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 21:41:40,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 3462 transitions. [2022-03-15 21:41:40,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:41:40,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:40,192 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:40,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-03-15 21:41:40,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-15 21:41:40,392 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:40,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:40,392 INFO L85 PathProgramCache]: Analyzing trace with hash -40107171, now seen corresponding path program 167 times [2022-03-15 21:41:40,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:40,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681146207] [2022-03-15 21:41:40,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:40,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:40,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:40,661 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 26 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:40,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:40,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681146207] [2022-03-15 21:41:40,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681146207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:40,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417700480] [2022-03-15 21:41:40,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:41:40,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:40,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:40,663 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:41:40,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-15 21:41:40,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 21:41:40,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:40,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 21:41:40,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:41,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:42,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417700480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:42,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:42,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 66 [2022-03-15 21:41:42,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1723705472] [2022-03-15 21:41:42,619 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:42,621 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:42,628 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 60 transitions. [2022-03-15 21:41:42,628 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:43,221 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [429638#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 429646#(< j1 M1), 429645#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 429641#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 429643#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 429642#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 429640#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 429639#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 429644#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1))))] [2022-03-15 21:41:43,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:41:43,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:43,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:41:43,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=4930, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:41:43,222 INFO L87 Difference]: Start difference. First operand 1314 states and 3462 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 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 21:41:46,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:46,367 INFO L93 Difference]: Finished difference Result 3685 states and 7583 transitions. [2022-03-15 21:41:46,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-15 21:41:46,367 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 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 30 [2022-03-15 21:41:46,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:46,371 INFO L225 Difference]: With dead ends: 3685 [2022-03-15 21:41:46,372 INFO L226 Difference]: Without dead ends: 3655 [2022-03-15 21:41:46,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5952 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3499, Invalid=16807, Unknown=0, NotChecked=0, Total=20306 [2022-03-15 21:41:46,373 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 261 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:46,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 0 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:41:46,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3655 states. [2022-03-15 21:41:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3655 to 1290. [2022-03-15 21:41:46,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1289 states have (on average 2.6245151280062062) internal successors, (3383), 1289 states have internal predecessors, (3383), 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 21:41:46,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 3383 transitions. [2022-03-15 21:41:46,393 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 3383 transitions. Word has length 30 [2022-03-15 21:41:46,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:46,394 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 3383 transitions. [2022-03-15 21:41:46,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 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 21:41:46,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 3383 transitions. [2022-03-15 21:41:46,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:41:46,395 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:46,395 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:46,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Forceful destruction successful, exit code 0 [2022-03-15 21:41:46,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-15 21:41:46,595 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:46,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:46,595 INFO L85 PathProgramCache]: Analyzing trace with hash -925905451, now seen corresponding path program 168 times [2022-03-15 21:41:46,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:46,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336270602] [2022-03-15 21:41:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:46,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 27 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:46,849 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:46,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336270602] [2022-03-15 21:41:46,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336270602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:46,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211120050] [2022-03-15 21:41:46,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:41:46,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:46,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:46,850 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:41:46,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-15 21:41:46,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 21:41:46,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:46,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 21:41:46,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:47,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 21 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:48,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211120050] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:48,649 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:48,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 67 [2022-03-15 21:41:48,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [204215404] [2022-03-15 21:41:48,649 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:48,650 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:48,656 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 64 transitions. [2022-03-15 21:41:48,656 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:49,334 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [436288#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 436289#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 436292#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 436290#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 436295#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 436296#(< j1 M1), 436197#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 436294#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 436291#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 436293#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)))] [2022-03-15 21:41:49,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:41:49,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:49,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:41:49,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=795, Invalid=5057, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:41:49,335 INFO L87 Difference]: Start difference. First operand 1290 states and 3383 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 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 21:41:51,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:51,582 INFO L93 Difference]: Finished difference Result 2657 states and 5704 transitions. [2022-03-15 21:41:51,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 21:41:51,583 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 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 30 [2022-03-15 21:41:51,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:51,586 INFO L225 Difference]: With dead ends: 2657 [2022-03-15 21:41:51,586 INFO L226 Difference]: Without dead ends: 2621 [2022-03-15 21:41:51,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4487 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2421, Invalid=12831, Unknown=0, NotChecked=0, Total=15252 [2022-03-15 21:41:51,587 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 281 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:51,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 0 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:41:51,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2621 states. [2022-03-15 21:41:51,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2621 to 1168. [2022-03-15 21:41:51,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1168 states, 1167 states have (on average 2.581833761782348) internal successors, (3013), 1167 states have internal predecessors, (3013), 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 21:41:51,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 3013 transitions. [2022-03-15 21:41:51,601 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 3013 transitions. Word has length 30 [2022-03-15 21:41:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:51,602 INFO L470 AbstractCegarLoop]: Abstraction has 1168 states and 3013 transitions. [2022-03-15 21:41:51,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 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 21:41:51,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 3013 transitions. [2022-03-15 21:41:51,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:41:51,603 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:51,603 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:51,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-15 21:41:51,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-15 21:41:51,803 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:51,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1679118941, now seen corresponding path program 169 times [2022-03-15 21:41:51,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:51,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106854065] [2022-03-15 21:41:51,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:51,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:52,072 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:52,072 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:52,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106854065] [2022-03-15 21:41:52,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106854065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:52,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282234422] [2022-03-15 21:41:52,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:41:52,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:52,074 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:41:52,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-15 21:41:52,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:52,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:41:52,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:52,822 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:52,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:54,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282234422] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:54,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:54,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 70 [2022-03-15 21:41:54,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1966068391] [2022-03-15 21:41:54,013 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:54,015 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:54,021 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 68 transitions. [2022-03-15 21:41:54,021 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:54,790 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [441635#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 441634#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 441633#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 441639#(< j1 M1), 441636#(and (or (not (< j1 M1)) (<= (+ 2 j2) j1)) (or (not (< j1 M1)) (<= counter 2)) (or (not (< j1 M1)) (<= 2 counter)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 441632#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 441638#(and (or (<= j2 j1) (not (< (+ 2 j1) M1))) (or (<= 0 counter) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 0) (not (< (+ 2 j1) M1)))), 441637#(and (or (not (< (+ j1 1) M1)) (<= (+ j2 1) j1)) (or (<= counter 1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= 1 counter) (not (< (+ j1 1) M1)))), 441631#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 441630#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 441629#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:41:54,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 21:41:54,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:54,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 21:41:54,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=5691, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 21:41:54,791 INFO L87 Difference]: Start difference. First operand 1168 states and 3013 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 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 21:41:57,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:57,893 INFO L93 Difference]: Finished difference Result 2791 states and 5817 transitions. [2022-03-15 21:41:57,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-15 21:41:57,894 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 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) Word has length 30 [2022-03-15 21:41:57,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:57,896 INFO L225 Difference]: With dead ends: 2791 [2022-03-15 21:41:57,897 INFO L226 Difference]: Without dead ends: 2739 [2022-03-15 21:41:57,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5765 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3644, Invalid=17526, Unknown=0, NotChecked=0, Total=21170 [2022-03-15 21:41:57,898 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 302 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:57,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 0 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:41:57,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2739 states. [2022-03-15 21:41:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2739 to 1081. [2022-03-15 21:41:57,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 2.585185185185185) internal successors, (2792), 1080 states have internal predecessors, (2792), 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 21:41:57,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 2792 transitions. [2022-03-15 21:41:57,912 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 2792 transitions. Word has length 30 [2022-03-15 21:41:57,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:57,912 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 2792 transitions. [2022-03-15 21:41:57,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 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 21:41:57,912 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 2792 transitions. [2022-03-15 21:41:57,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:41:57,913 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:57,913 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:57,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-03-15 21:41:58,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:58,113 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:58,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:58,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1038800531, now seen corresponding path program 170 times [2022-03-15 21:41:58,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:58,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241009583] [2022-03-15 21:41:58,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:58,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 31 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:58,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:58,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241009583] [2022-03-15 21:41:58,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241009583] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:58,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349602696] [2022-03-15 21:41:58,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:41:58,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:58,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:58,325 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:41:58,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-15 21:41:58,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:41:58,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:58,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 21:41:58,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:59,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:00,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349602696] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:00,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:00,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 64 [2022-03-15 21:42:00,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [723679727] [2022-03-15 21:42:00,040 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:00,041 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:00,046 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 50 transitions. [2022-03-15 21:42:00,046 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:00,412 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [446960#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 446962#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 446869#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 446964#(< j1 M1), 446963#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 446961#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:42:00,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:42:00,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:42:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=4074, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:42:00,413 INFO L87 Difference]: Start difference. First operand 1081 states and 2792 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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 21:42:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:03,820 INFO L93 Difference]: Finished difference Result 3843 states and 8003 transitions. [2022-03-15 21:42:03,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-15 21:42:03,820 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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 30 [2022-03-15 21:42:03,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:03,824 INFO L225 Difference]: With dead ends: 3843 [2022-03-15 21:42:03,825 INFO L226 Difference]: Without dead ends: 3829 [2022-03-15 21:42:03,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6613 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4436, Invalid=18516, Unknown=0, NotChecked=0, Total=22952 [2022-03-15 21:42:03,826 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 258 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:03,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 0 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:42:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3829 states. [2022-03-15 21:42:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3829 to 1330. [2022-03-15 21:42:03,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1330 states, 1329 states have (on average 2.6418359668924003) internal successors, (3511), 1329 states have internal predecessors, (3511), 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 21:42:03,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1330 states to 1330 states and 3511 transitions. [2022-03-15 21:42:03,845 INFO L78 Accepts]: Start accepts. Automaton has 1330 states and 3511 transitions. Word has length 30 [2022-03-15 21:42:03,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:03,845 INFO L470 AbstractCegarLoop]: Abstraction has 1330 states and 3511 transitions. [2022-03-15 21:42:03,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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 21:42:03,845 INFO L276 IsEmpty]: Start isEmpty. Operand 1330 states and 3511 transitions. [2022-03-15 21:42:03,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:03,846 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:03,846 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:03,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-15 21:42:04,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:04,047 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:04,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:04,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1109996005, now seen corresponding path program 171 times [2022-03-15 21:42:04,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:04,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034295620] [2022-03-15 21:42:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:04,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:04,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 32 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:04,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:04,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034295620] [2022-03-15 21:42:04,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034295620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:04,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582384541] [2022-03-15 21:42:04,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:42:04,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:04,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:04,299 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:04,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-15 21:42:04,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 21:42:04,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:04,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-15 21:42:04,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:05,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:06,114 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:06,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582384541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:06,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:06,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 67 [2022-03-15 21:42:06,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1353220199] [2022-03-15 21:42:06,115 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:06,116 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:06,121 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 54 transitions. [2022-03-15 21:42:06,121 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:06,553 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [453880#(< j1 M1), 453879#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 453876#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 453878#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 453874#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 453875#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 453877#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1)))] [2022-03-15 21:42:06,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:42:06,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:06,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:42:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=798, Invalid=4752, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:42:06,554 INFO L87 Difference]: Start difference. First operand 1330 states and 3511 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 21:42:10,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:10,156 INFO L93 Difference]: Finished difference Result 3627 states and 7596 transitions. [2022-03-15 21:42:10,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-15 21:42:10,156 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 30 [2022-03-15 21:42:10,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:10,160 INFO L225 Difference]: With dead ends: 3627 [2022-03-15 21:42:10,161 INFO L226 Difference]: Without dead ends: 3609 [2022-03-15 21:42:10,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7133 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4657, Invalid=20149, Unknown=0, NotChecked=0, Total=24806 [2022-03-15 21:42:10,162 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 257 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:10,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 0 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:42:10,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2022-03-15 21:42:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 1325. [2022-03-15 21:42:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.63595166163142) internal successors, (3490), 1324 states have internal predecessors, (3490), 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 21:42:10,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3490 transitions. [2022-03-15 21:42:10,180 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3490 transitions. Word has length 30 [2022-03-15 21:42:10,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:10,180 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 3490 transitions. [2022-03-15 21:42:10,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 27 states have internal predecessors, (49), 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 21:42:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3490 transitions. [2022-03-15 21:42:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:10,182 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:10,182 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:10,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-03-15 21:42:10,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-03-15 21:42:10,382 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:10,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:10,382 INFO L85 PathProgramCache]: Analyzing trace with hash -996788115, now seen corresponding path program 172 times [2022-03-15 21:42:10,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:10,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65772588] [2022-03-15 21:42:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:10,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 33 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:10,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:10,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65772588] [2022-03-15 21:42:10,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65772588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:10,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405664439] [2022-03-15 21:42:10,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:42:10,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:10,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:10,613 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:10,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-15 21:42:10,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:42:10,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:10,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:42:10,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:11,352 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:11,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:12,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405664439] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:12,377 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:12,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 68 [2022-03-15 21:42:12,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [768052381] [2022-03-15 21:42:12,377 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:12,378 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:12,384 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 58 transitions. [2022-03-15 21:42:12,384 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:12,916 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [460574#(< j1 M1), 460571#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 460567#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 460569#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 460568#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 460573#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 460572#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 460570#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:42:12,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:42:12,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:12,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:42:12,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=5022, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:42:12,917 INFO L87 Difference]: Start difference. First operand 1325 states and 3490 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 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 21:42:16,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:16,102 INFO L93 Difference]: Finished difference Result 3306 states and 6997 transitions. [2022-03-15 21:42:16,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-15 21:42:16,102 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 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 30 [2022-03-15 21:42:16,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:16,106 INFO L225 Difference]: With dead ends: 3306 [2022-03-15 21:42:16,107 INFO L226 Difference]: Without dead ends: 3284 [2022-03-15 21:42:16,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6458 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4246, Invalid=18706, Unknown=0, NotChecked=0, Total=22952 [2022-03-15 21:42:16,108 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 256 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:16,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 0 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:42:16,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3284 states. [2022-03-15 21:42:16,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3284 to 1310. [2022-03-15 21:42:16,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 2.627196333078686) internal successors, (3439), 1309 states have internal predecessors, (3439), 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 21:42:16,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 3439 transitions. [2022-03-15 21:42:16,129 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 3439 transitions. Word has length 30 [2022-03-15 21:42:16,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:16,129 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 3439 transitions. [2022-03-15 21:42:16,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 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 21:42:16,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 3439 transitions. [2022-03-15 21:42:16,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:16,130 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:16,131 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:16,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-03-15 21:42:16,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:16,331 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:16,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1882586395, now seen corresponding path program 173 times [2022-03-15 21:42:16,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:16,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616775284] [2022-03-15 21:42:16,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:16,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 34 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:16,588 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:16,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616775284] [2022-03-15 21:42:16,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616775284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:16,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136400353] [2022-03-15 21:42:16,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:42:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:16,589 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:16,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-15 21:42:16,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:42:16,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:16,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-15 21:42:16,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:17,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:18,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136400353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:18,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:18,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 67 [2022-03-15 21:42:18,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1310062132] [2022-03-15 21:42:18,196 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:18,197 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:18,202 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 62 transitions. [2022-03-15 21:42:18,203 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:18,798 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [466900#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 466893#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 466897#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 466899#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 466898#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 466896#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 466895#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 466901#(< j1 M1), 466894#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:42:18,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:42:18,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:18,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:42:18,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=5071, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:42:18,799 INFO L87 Difference]: Start difference. First operand 1310 states and 3439 transitions. Second operand has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 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 21:42:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:21,399 INFO L93 Difference]: Finished difference Result 2795 states and 6056 transitions. [2022-03-15 21:42:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 21:42:21,400 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 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 30 [2022-03-15 21:42:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:21,402 INFO L225 Difference]: With dead ends: 2795 [2022-03-15 21:42:21,402 INFO L226 Difference]: Without dead ends: 2769 [2022-03-15 21:42:21,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5640 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3224, Invalid=15682, Unknown=0, NotChecked=0, Total=18906 [2022-03-15 21:42:21,403 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 276 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:21,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 0 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:42:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2022-03-15 21:42:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1285. [2022-03-15 21:42:21,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1285 states, 1284 states have (on average 2.615264797507788) internal successors, (3358), 1284 states have internal predecessors, (3358), 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 21:42:21,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1285 states to 1285 states and 3358 transitions. [2022-03-15 21:42:21,419 INFO L78 Accepts]: Start accepts. Automaton has 1285 states and 3358 transitions. Word has length 30 [2022-03-15 21:42:21,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:21,419 INFO L470 AbstractCegarLoop]: Abstraction has 1285 states and 3358 transitions. [2022-03-15 21:42:21,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.71875) internal successors, (55), 31 states have internal predecessors, (55), 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 21:42:21,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1285 states and 3358 transitions. [2022-03-15 21:42:21,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:21,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:21,420 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:21,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-15 21:42:21,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:21,620 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:21,621 INFO L85 PathProgramCache]: Analyzing trace with hash 722437997, now seen corresponding path program 174 times [2022-03-15 21:42:21,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:21,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824147595] [2022-03-15 21:42:21,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:21,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 35 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:21,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:21,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824147595] [2022-03-15 21:42:21,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824147595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:21,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785066255] [2022-03-15 21:42:21,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:42:21,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:21,881 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:21,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-15 21:42:21,910 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:42:21,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:21,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:42:21,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:22,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:23,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785066255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:23,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:23,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 70 [2022-03-15 21:42:23,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1240402377] [2022-03-15 21:42:23,716 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:23,717 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:23,731 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 66 transitions. [2022-03-15 21:42:23,731 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:24,475 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [472643#(< j1 M1), 472634#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 472640#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 472641#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 472639#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 472638#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 472637#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 472635#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 472636#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 472642#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))))] [2022-03-15 21:42:24,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-15 21:42:24,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:24,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-15 21:42:24,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=5587, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:42:24,476 INFO L87 Difference]: Start difference. First operand 1285 states and 3358 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 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 21:42:26,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:26,509 INFO L93 Difference]: Finished difference Result 2095 states and 4730 transitions. [2022-03-15 21:42:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 21:42:26,510 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 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 30 [2022-03-15 21:42:26,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:26,512 INFO L225 Difference]: With dead ends: 2095 [2022-03-15 21:42:26,512 INFO L226 Difference]: Without dead ends: 2065 [2022-03-15 21:42:26,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4201 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2421, Invalid=12585, Unknown=0, NotChecked=0, Total=15006 [2022-03-15 21:42:26,513 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 241 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:26,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 0 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:42:26,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2022-03-15 21:42:26,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1170. [2022-03-15 21:42:26,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 2.5748502994011977) internal successors, (3010), 1169 states have internal predecessors, (3010), 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 21:42:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 3010 transitions. [2022-03-15 21:42:26,526 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 3010 transitions. Word has length 30 [2022-03-15 21:42:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:26,526 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 3010 transitions. [2022-03-15 21:42:26,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 33 states have internal predecessors, (58), 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 21:42:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 3010 transitions. [2022-03-15 21:42:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:26,527 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:26,527 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:26,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-15 21:42:26,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2022-03-15 21:42:26,727 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:26,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:26,728 INFO L85 PathProgramCache]: Analyzing trace with hash -126184475, now seen corresponding path program 175 times [2022-03-15 21:42:26,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:26,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155480636] [2022-03-15 21:42:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:26,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:26,996 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:26,996 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:26,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155480636] [2022-03-15 21:42:26,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155480636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:26,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722428339] [2022-03-15 21:42:26,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:42:26,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:26,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:26,997 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:26,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-15 21:42:27,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:27,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:42:27,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:27,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:28,761 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:28,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722428339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:28,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:28,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 71 [2022-03-15 21:42:28,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2000718624] [2022-03-15 21:42:28,761 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:28,763 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:28,769 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 70 transitions. [2022-03-15 21:42:28,769 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:29,555 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [477418#(or (<= (+ 9 j2) M2) (<= counter 7) (<= M2 (+ 7 j2))), 477419#(< j1 M1), 477411#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 477415#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 477410#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 477412#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 477413#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 477416#(and (or (not (< j1 M1)) (<= counter 1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 1 counter)) (or (not (< j1 M1)) (<= (+ j2 1) j1))), 477414#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 477417#(and (or (<= counter 0) (not (< (+ j1 1) M1))) (or (<= 0 counter) (not (< (+ j1 1) M1))) (or (<= j2 j1) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 477409#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:42:29,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 21:42:29,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:29,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 21:42:29,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=970, Invalid=5836, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:42:29,556 INFO L87 Difference]: Start difference. First operand 1170 states and 3010 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 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 21:42:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:32,312 INFO L93 Difference]: Finished difference Result 2162 states and 4732 transitions. [2022-03-15 21:42:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-15 21:42:32,312 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 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) Word has length 30 [2022-03-15 21:42:32,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:32,315 INFO L225 Difference]: With dead ends: 2162 [2022-03-15 21:42:32,315 INFO L226 Difference]: Without dead ends: 2114 [2022-03-15 21:42:32,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5610 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3590, Invalid=17002, Unknown=0, NotChecked=0, Total=20592 [2022-03-15 21:42:32,316 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 281 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:32,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 0 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:42:32,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2114 states. [2022-03-15 21:42:32,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2114 to 1084. [2022-03-15 21:42:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1084 states, 1083 states have (on average 2.5835641735918746) internal successors, (2798), 1083 states have internal predecessors, (2798), 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 21:42:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1084 states to 1084 states and 2798 transitions. [2022-03-15 21:42:32,328 INFO L78 Accepts]: Start accepts. Automaton has 1084 states and 2798 transitions. Word has length 30 [2022-03-15 21:42:32,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:32,328 INFO L470 AbstractCegarLoop]: Abstraction has 1084 states and 2798 transitions. [2022-03-15 21:42:32,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 35 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 21:42:32,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1084 states and 2798 transitions. [2022-03-15 21:42:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:32,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:32,329 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:32,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-15 21:42:32,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:32,530 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:32,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:32,530 INFO L85 PathProgramCache]: Analyzing trace with hash -20717867, now seen corresponding path program 176 times [2022-03-15 21:42:32,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:32,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38719862] [2022-03-15 21:42:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:32,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 38 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:32,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:32,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38719862] [2022-03-15 21:42:32,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38719862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:32,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071404538] [2022-03-15 21:42:32,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:42:32,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:32,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:32,726 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:32,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-15 21:42:32,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:42:32,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:32,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:42:32,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:33,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:34,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071404538] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:34,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:34,253 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 24] total 63 [2022-03-15 21:42:34,253 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1307150658] [2022-03-15 21:42:34,253 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:34,254 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:34,258 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2022-03-15 21:42:34,259 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:34,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [482019#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 482112#(< j1 M1), 482111#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 482110#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 21:42:34,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:42:34,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:34,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:42:34,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=751, Invalid=3671, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:42:34,483 INFO L87 Difference]: Start difference. First operand 1084 states and 2798 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:42:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:37,025 INFO L93 Difference]: Finished difference Result 2591 states and 5785 transitions. [2022-03-15 21:42:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-15 21:42:37,025 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 21:42:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:37,028 INFO L225 Difference]: With dead ends: 2591 [2022-03-15 21:42:37,028 INFO L226 Difference]: Without dead ends: 2585 [2022-03-15 21:42:37,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5454 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3883, Invalid=15857, Unknown=0, NotChecked=0, Total=19740 [2022-03-15 21:42:37,030 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 237 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:37,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 0 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:42:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2022-03-15 21:42:37,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 1316. [2022-03-15 21:42:37,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 2.6342205323193917) internal successors, (3464), 1315 states have internal predecessors, (3464), 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 21:42:37,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 3464 transitions. [2022-03-15 21:42:37,054 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 3464 transitions. Word has length 30 [2022-03-15 21:42:37,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:37,055 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 3464 transitions. [2022-03-15 21:42:37,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:42:37,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 3464 transitions. [2022-03-15 21:42:37,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:37,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:37,056 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:37,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-15 21:42:37,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:37,271 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:37,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:37,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1336875171, now seen corresponding path program 177 times [2022-03-15 21:42:37,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:37,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025541304] [2022-03-15 21:42:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:37,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:37,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 39 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:37,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:37,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025541304] [2022-03-15 21:42:37,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025541304] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:37,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381728413] [2022-03-15 21:42:37,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:42:37,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:37,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:37,479 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:37,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-15 21:42:37,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:42:37,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:37,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-15 21:42:37,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:38,241 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:38,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:39,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381728413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:39,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:39,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 66 [2022-03-15 21:42:39,209 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1991125641] [2022-03-15 21:42:39,209 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:39,210 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:39,215 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 48 transitions. [2022-03-15 21:42:39,215 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:39,510 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [487725#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 487726#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 487728#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 487727#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 487729#(< j1 M1)] [2022-03-15 21:42:39,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:42:39,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:39,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:42:39,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=777, Invalid=4335, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:42:39,511 INFO L87 Difference]: Start difference. First operand 1316 states and 3464 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 21:42:42,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:42,442 INFO L93 Difference]: Finished difference Result 2692 states and 5980 transitions. [2022-03-15 21:42:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 21:42:42,442 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 30 [2022-03-15 21:42:42,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:42,445 INFO L225 Difference]: With dead ends: 2692 [2022-03-15 21:42:42,445 INFO L226 Difference]: Without dead ends: 2684 [2022-03-15 21:42:42,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6567 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=4474, Invalid=19088, Unknown=0, NotChecked=0, Total=23562 [2022-03-15 21:42:42,446 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 273 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:42,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 0 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:42:42,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2684 states. [2022-03-15 21:42:42,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2684 to 1324. [2022-03-15 21:42:42,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 2.63265306122449) internal successors, (3483), 1323 states have internal predecessors, (3483), 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 21:42:42,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3483 transitions. [2022-03-15 21:42:42,463 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3483 transitions. Word has length 30 [2022-03-15 21:42:42,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:42,463 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 3483 transitions. [2022-03-15 21:42:42,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 24 states have internal predecessors, (44), 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 21:42:42,463 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3483 transitions. [2022-03-15 21:42:42,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:42,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:42,464 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:42,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-15 21:42:42,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:42,665 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:42,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:42,665 INFO L85 PathProgramCache]: Analyzing trace with hash 811921365, now seen corresponding path program 178 times [2022-03-15 21:42:42,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:42,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351951688] [2022-03-15 21:42:42,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:42,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:42,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 40 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:42,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:42,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351951688] [2022-03-15 21:42:42,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351951688] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:42,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970592596] [2022-03-15 21:42:42,914 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:42:42,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:42,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:42,915 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:42,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-15 21:42:42,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:42:42,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:42,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 21:42:42,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:43,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:44,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970592596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:44,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:44,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 67 [2022-03-15 21:42:44,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [584558866] [2022-03-15 21:42:44,646 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:44,648 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:44,653 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 52 transitions. [2022-03-15 21:42:44,653 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:45,077 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [493477#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 493476#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 493480#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 493479#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 493481#(< j1 M1), 493478#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:42:45,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:42:45,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:45,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:42:45,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=4611, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:42:45,078 INFO L87 Difference]: Start difference. First operand 1324 states and 3483 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 21:42:48,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:48,175 INFO L93 Difference]: Finished difference Result 2657 states and 5914 transitions. [2022-03-15 21:42:48,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-15 21:42:48,176 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 30 [2022-03-15 21:42:48,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:48,179 INFO L225 Difference]: With dead ends: 2657 [2022-03-15 21:42:48,179 INFO L226 Difference]: Without dead ends: 2647 [2022-03-15 21:42:48,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6790 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4658, Invalid=19834, Unknown=0, NotChecked=0, Total=24492 [2022-03-15 21:42:48,180 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 288 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:48,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 0 Invalid, 933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:42:48,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2022-03-15 21:42:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 1324. [2022-03-15 21:42:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 1323 states have (on average 2.6288737717309147) internal successors, (3478), 1323 states have internal predecessors, (3478), 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 21:42:48,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 3478 transitions. [2022-03-15 21:42:48,197 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 3478 transitions. Word has length 30 [2022-03-15 21:42:48,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:48,197 INFO L470 AbstractCegarLoop]: Abstraction has 1324 states and 3478 transitions. [2022-03-15 21:42:48,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 26 states have internal predecessors, (47), 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 21:42:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 3478 transitions. [2022-03-15 21:42:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:48,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:48,198 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:48,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Forceful destruction successful, exit code 0 [2022-03-15 21:42:48,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-15 21:42:48,401 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:48,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:48,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1294862755, now seen corresponding path program 179 times [2022-03-15 21:42:48,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:48,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273618722] [2022-03-15 21:42:48,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:48,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 41 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:48,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:48,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273618722] [2022-03-15 21:42:48,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273618722] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:48,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408834651] [2022-03-15 21:42:48,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:42:48,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:48,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:48,632 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:48,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-15 21:42:48,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:42:48,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:48,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 21:42:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:49,284 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:49,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:50,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408834651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:50,240 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:50,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 66 [2022-03-15 21:42:50,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1982785457] [2022-03-15 21:42:50,240 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:50,242 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:50,247 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 56 transitions. [2022-03-15 21:42:50,247 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:50,687 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [499199#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 499197#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 499194#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 499198#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 499200#(< j1 M1), 499195#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 499196#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:42:50,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:42:50,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:42:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=4666, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:42:50,687 INFO L87 Difference]: Start difference. First operand 1324 states and 3478 transitions. Second operand has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 21:42:53,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:53,778 INFO L93 Difference]: Finished difference Result 2532 states and 5668 transitions. [2022-03-15 21:42:53,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-15 21:42:53,779 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 30 [2022-03-15 21:42:53,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:53,781 INFO L225 Difference]: With dead ends: 2532 [2022-03-15 21:42:53,781 INFO L226 Difference]: Without dead ends: 2520 [2022-03-15 21:42:53,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7034 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4238, Invalid=19324, Unknown=0, NotChecked=0, Total=23562 [2022-03-15 21:42:53,782 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 276 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:53,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 0 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:42:53,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2520 states. [2022-03-15 21:42:53,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2520 to 1316. [2022-03-15 21:42:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 1315 states have (on average 2.622813688212928) internal successors, (3449), 1315 states have internal predecessors, (3449), 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 21:42:53,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 3449 transitions. [2022-03-15 21:42:53,798 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 3449 transitions. Word has length 30 [2022-03-15 21:42:53,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:53,799 INFO L470 AbstractCegarLoop]: Abstraction has 1316 states and 3449 transitions. [2022-03-15 21:42:53,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 28 states have internal predecessors, (50), 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 21:42:53,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 3449 transitions. [2022-03-15 21:42:53,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:53,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:53,800 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:53,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-15 21:42:54,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:54,000 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:54,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:54,000 INFO L85 PathProgramCache]: Analyzing trace with hash 2114306261, now seen corresponding path program 180 times [2022-03-15 21:42:54,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:54,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558084325] [2022-03-15 21:42:54,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:54,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 42 proven. 89 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:54,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:54,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558084325] [2022-03-15 21:42:54,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558084325] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:54,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493314666] [2022-03-15 21:42:54,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:42:54,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:54,261 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:54,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-15 21:42:54,290 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:42:54,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:54,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-15 21:42:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:55,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:55,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493314666] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:55,946 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:55,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 69 [2022-03-15 21:42:55,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [667119113] [2022-03-15 21:42:55,947 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:55,948 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:55,954 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 60 transitions. [2022-03-15 21:42:55,954 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:56,490 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [504770#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 504773#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 504772#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 504769#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 504775#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 504774#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 504771#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 504776#(< j1 M1)] [2022-03-15 21:42:56,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:42:56,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:56,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:42:56,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=5193, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:42:56,491 INFO L87 Difference]: Start difference. First operand 1316 states and 3449 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 21:42:59,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:59,368 INFO L93 Difference]: Finished difference Result 2316 states and 5250 transitions. [2022-03-15 21:42:59,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-15 21:42:59,368 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 30 [2022-03-15 21:42:59,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:59,370 INFO L225 Difference]: With dead ends: 2316 [2022-03-15 21:42:59,371 INFO L226 Difference]: Without dead ends: 2302 [2022-03-15 21:42:59,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5923 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3859, Invalid=17603, Unknown=0, NotChecked=0, Total=21462 [2022-03-15 21:42:59,371 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 298 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:59,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 0 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:42:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2022-03-15 21:42:59,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1300. [2022-03-15 21:42:59,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1300 states, 1299 states have (on average 2.6143187066974596) internal successors, (3396), 1299 states have internal predecessors, (3396), 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 21:42:59,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1300 states to 1300 states and 3396 transitions. [2022-03-15 21:42:59,385 INFO L78 Accepts]: Start accepts. Automaton has 1300 states and 3396 transitions. Word has length 30 [2022-03-15 21:42:59,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:59,385 INFO L470 AbstractCegarLoop]: Abstraction has 1300 states and 3396 transitions. [2022-03-15 21:42:59,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 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 21:42:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 1300 states and 3396 transitions. [2022-03-15 21:42:59,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:42:59,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:59,386 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:59,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-15 21:42:59,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:59,587 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:59,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:59,587 INFO L85 PathProgramCache]: Analyzing trace with hash 424363357, now seen corresponding path program 181 times [2022-03-15 21:42:59,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:59,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820308604] [2022-03-15 21:42:59,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:59,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:59,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:59,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820308604] [2022-03-15 21:42:59,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820308604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:59,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693077714] [2022-03-15 21:42:59,835 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:42:59,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:59,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:59,836 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:42:59,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-15 21:42:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:59,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 21:42:59,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:00,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:01,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693077714] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:01,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:01,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 70 [2022-03-15 21:43:01,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1929702156] [2022-03-15 21:43:01,499 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:01,500 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:01,505 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 64 transitions. [2022-03-15 21:43:01,506 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:02,135 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [510076#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 510082#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 510081#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 510078#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 510080#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 510079#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 510083#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 510084#(< j1 M1), 510077#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:43:02,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:43:02,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:02,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:43:02,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=857, Invalid=5463, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:43:02,136 INFO L87 Difference]: Start difference. First operand 1300 states and 3396 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 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 21:43:04,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:04,534 INFO L93 Difference]: Finished difference Result 2028 states and 4688 transitions. [2022-03-15 21:43:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-15 21:43:04,534 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 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 30 [2022-03-15 21:43:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:04,537 INFO L225 Difference]: With dead ends: 2028 [2022-03-15 21:43:04,537 INFO L226 Difference]: Without dead ends: 2012 [2022-03-15 21:43:04,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4873 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3060, Invalid=14762, Unknown=0, NotChecked=0, Total=17822 [2022-03-15 21:43:04,537 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 303 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:04,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 0 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:43:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2012 states. [2022-03-15 21:43:04,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2012 to 1276. [2022-03-15 21:43:04,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 1275 states have (on average 2.6031372549019607) internal successors, (3319), 1275 states have internal predecessors, (3319), 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 21:43:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 3319 transitions. [2022-03-15 21:43:04,552 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 3319 transitions. Word has length 30 [2022-03-15 21:43:04,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:04,552 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 3319 transitions. [2022-03-15 21:43:04,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 32 states have internal predecessors, (56), 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 21:43:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 3319 transitions. [2022-03-15 21:43:04,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:04,553 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:04,553 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:04,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:04,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-03-15 21:43:04,771 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:04,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash -424259115, now seen corresponding path program 182 times [2022-03-15 21:43:04,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:04,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990041268] [2022-03-15 21:43:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:04,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:05,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:05,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990041268] [2022-03-15 21:43:05,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990041268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:05,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797212344] [2022-03-15 21:43:05,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:43:05,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:05,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:05,034 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:05,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-15 21:43:05,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:43:05,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:05,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-15 21:43:05,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:05,779 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:05,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 36 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:06,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797212344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:06,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:06,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2022-03-15 21:43:06,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2040423507] [2022-03-15 21:43:06,636 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:06,638 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:06,643 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 68 transitions. [2022-03-15 21:43:06,644 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:07,391 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [515018#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 515021#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 515017#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 515023#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1)))), 515025#(< j1 M1), 515024#(or (<= (+ 9 j2) M2) (<= counter 7) (<= M2 (+ 7 j2))), 515019#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 515020#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 515022#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 514926#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:43:07,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 21:43:07,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:07,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 21:43:07,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=5328, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 21:43:07,392 INFO L87 Difference]: Start difference. First operand 1276 states and 3319 transitions. Second operand has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 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 21:43:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:09,168 INFO L93 Difference]: Finished difference Result 1651 states and 3919 transitions. [2022-03-15 21:43:09,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:43:09,168 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 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 30 [2022-03-15 21:43:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:09,170 INFO L225 Difference]: With dead ends: 1651 [2022-03-15 21:43:09,170 INFO L226 Difference]: Without dead ends: 1633 [2022-03-15 21:43:09,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3920 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1980, Invalid=10902, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 21:43:09,171 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 274 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:09,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 0 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:43:09,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2022-03-15 21:43:09,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 1172. [2022-03-15 21:43:09,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1171 states have (on average 2.5678906917164817) internal successors, (3007), 1171 states have internal predecessors, (3007), 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 21:43:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 3007 transitions. [2022-03-15 21:43:09,183 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 3007 transitions. Word has length 30 [2022-03-15 21:43:09,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:09,183 INFO L470 AbstractCegarLoop]: Abstraction has 1172 states and 3007 transitions. [2022-03-15 21:43:09,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 34 states have internal predecessors, (59), 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 21:43:09,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 3007 transitions. [2022-03-15 21:43:09,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:09,184 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:09,184 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:09,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:09,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:09,384 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:09,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:09,385 INFO L85 PathProgramCache]: Analyzing trace with hash -961751971, now seen corresponding path program 183 times [2022-03-15 21:43:09,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:09,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174852086] [2022-03-15 21:43:09,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:09,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:09,662 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:09,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:09,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174852086] [2022-03-15 21:43:09,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174852086] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:09,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889130959] [2022-03-15 21:43:09,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:43:09,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:09,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:09,663 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:09,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-15 21:43:09,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:43:09,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:09,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-15 21:43:09,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:10,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:11,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889130959] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:11,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:11,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 72 [2022-03-15 21:43:11,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [875594280] [2022-03-15 21:43:11,348 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:11,349 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:11,355 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 72 transitions. [2022-03-15 21:43:11,355 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:12,143 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [519341#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 519342#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 519348#(< j1 M1), 519339#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 519343#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 519345#(or (<= (+ 9 j2) M2) (<= counter 7) (<= M2 (+ 7 j2))), 519344#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 519338#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 519340#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 519346#(or (<= M2 (+ j2 8)) (<= counter 8) (<= (+ j2 10) M2)), 519347#(and (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 0)) (or (not (< j1 M1)) (<= 0 counter)) (or (<= j2 j1) (not (< j1 M1))))] [2022-03-15 21:43:12,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 21:43:12,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:12,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 21:43:12,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=5984, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 21:43:12,144 INFO L87 Difference]: Start difference. First operand 1172 states and 3007 transitions. Second operand has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 36 states have internal predecessors, (62), 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 21:43:14,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:14,304 INFO L93 Difference]: Finished difference Result 1569 states and 3696 transitions. [2022-03-15 21:43:14,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-15 21:43:14,304 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 36 states have internal predecessors, (62), 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 30 [2022-03-15 21:43:14,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:14,306 INFO L225 Difference]: With dead ends: 1569 [2022-03-15 21:43:14,306 INFO L226 Difference]: Without dead ends: 1549 [2022-03-15 21:43:14,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4817 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2869, Invalid=14161, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 21:43:14,307 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 333 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:14,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 0 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:43:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1549 states. [2022-03-15 21:43:14,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1549 to 1086. [2022-03-15 21:43:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.5824884792626728) internal successors, (2802), 1085 states have internal predecessors, (2802), 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 21:43:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2802 transitions. [2022-03-15 21:43:14,318 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2802 transitions. Word has length 30 [2022-03-15 21:43:14,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:14,318 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 2802 transitions. [2022-03-15 21:43:14,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6756756756756757) internal successors, (62), 36 states have internal predecessors, (62), 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 21:43:14,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2802 transitions. [2022-03-15 21:43:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:14,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:14,319 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:14,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:14,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:14,520 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:14,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:14,520 INFO L85 PathProgramCache]: Analyzing trace with hash 594749805, now seen corresponding path program 184 times [2022-03-15 21:43:14,521 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:14,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464317402] [2022-03-15 21:43:14,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:14,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:14,683 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 46 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:14,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:14,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464317402] [2022-03-15 21:43:14,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464317402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:14,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511893256] [2022-03-15 21:43:14,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:43:14,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:14,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:14,685 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:14,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-15 21:43:14,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:43:14,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:43:14,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:15,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:16,120 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:16,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511893256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:16,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:16,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24, 24] total 61 [2022-03-15 21:43:16,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1151465037] [2022-03-15 21:43:16,120 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:16,122 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:16,126 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 38 transitions. [2022-03-15 21:43:16,126 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:16,200 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [523421#(< j1 M1), 523420#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:43:16,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:43:16,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:16,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:43:16,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3271, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:43:16,201 INFO L87 Difference]: Start difference. First operand 1086 states and 2802 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:16,861 INFO L93 Difference]: Finished difference Result 2034 states and 4660 transitions. [2022-03-15 21:43:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:43:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 21:43:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:16,864 INFO L225 Difference]: With dead ends: 2034 [2022-03-15 21:43:16,864 INFO L226 Difference]: Without dead ends: 2030 [2022-03-15 21:43:16,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2631 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1605, Invalid=6767, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 21:43:16,865 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 166 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:16,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 0 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:43:16,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2030 states. [2022-03-15 21:43:16,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2030 to 1283. [2022-03-15 21:43:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 2.6154446177847115) internal successors, (3353), 1282 states have internal predecessors, (3353), 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 21:43:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3353 transitions. [2022-03-15 21:43:16,880 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3353 transitions. Word has length 30 [2022-03-15 21:43:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:16,880 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 3353 transitions. [2022-03-15 21:43:16,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3353 transitions. [2022-03-15 21:43:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:16,881 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:16,881 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:16,896 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-15 21:43:17,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:17,097 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:17,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:17,097 INFO L85 PathProgramCache]: Analyzing trace with hash -278990875, now seen corresponding path program 185 times [2022-03-15 21:43:17,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:17,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451775677] [2022-03-15 21:43:17,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:17,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:17,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:17,272 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 47 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:17,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:17,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451775677] [2022-03-15 21:43:17,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451775677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:17,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20304539] [2022-03-15 21:43:17,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:43:17,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:17,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:17,274 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:17,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-15 21:43:17,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:43:17,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:17,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:43:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:17,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:18,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20304539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:18,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:18,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 24, 24] total 62 [2022-03-15 21:43:18,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1393283059] [2022-03-15 21:43:18,726 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:18,727 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:18,732 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 42 transitions. [2022-03-15 21:43:18,732 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:18,897 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [528315#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 528317#(< j1 M1), 528316#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:43:18,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:43:18,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:43:18,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=3555, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:43:18,898 INFO L87 Difference]: Start difference. First operand 1283 states and 3353 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:19,789 INFO L93 Difference]: Finished difference Result 2187 states and 4974 transitions. [2022-03-15 21:43:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:43:19,789 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 21:43:19,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:19,792 INFO L225 Difference]: With dead ends: 2187 [2022-03-15 21:43:19,792 INFO L226 Difference]: Without dead ends: 2181 [2022-03-15 21:43:19,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3326 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1869, Invalid=8433, Unknown=0, NotChecked=0, Total=10302 [2022-03-15 21:43:19,792 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 180 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:19,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 0 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:43:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-03-15 21:43:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1298. [2022-03-15 21:43:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.6168080185042406) internal successors, (3394), 1297 states have internal predecessors, (3394), 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 21:43:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 3394 transitions. [2022-03-15 21:43:19,806 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 3394 transitions. Word has length 30 [2022-03-15 21:43:19,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:19,807 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 3394 transitions. [2022-03-15 21:43:19,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:19,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 3394 transitions. [2022-03-15 21:43:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:19,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:19,808 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:19,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:20,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:20,008 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:20,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:20,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1595148179, now seen corresponding path program 186 times [2022-03-15 21:43:20,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:20,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303649314] [2022-03-15 21:43:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:20,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:20,198 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:20,198 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303649314] [2022-03-15 21:43:20,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303649314] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:20,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617034562] [2022-03-15 21:43:20,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:43:20,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:20,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:20,200 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:20,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-15 21:43:20,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:43:20,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:20,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 21:43:20,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:20,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:21,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617034562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:21,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:21,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 24, 24] total 65 [2022-03-15 21:43:21,728 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1806934955] [2022-03-15 21:43:21,728 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:21,729 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:21,735 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 46 transitions. [2022-03-15 21:43:21,735 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:21,964 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [533416#(< j1 M1), 533415#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 533414#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 533413#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter)))] [2022-03-15 21:43:21,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:43:21,964 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:21,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:43:21,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=4089, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:43:21,965 INFO L87 Difference]: Start difference. First operand 1298 states and 3394 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 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 21:43:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:22,986 INFO L93 Difference]: Finished difference Result 2251 states and 5106 transitions. [2022-03-15 21:43:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:43:22,987 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 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 30 [2022-03-15 21:43:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:22,989 INFO L225 Difference]: With dead ends: 2251 [2022-03-15 21:43:22,990 INFO L226 Difference]: Without dead ends: 2243 [2022-03-15 21:43:22,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3680 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2116, Invalid=9874, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 21:43:22,991 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 216 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:22,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 0 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:43:22,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2243 states. [2022-03-15 21:43:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2243 to 1307. [2022-03-15 21:43:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 2.616385911179173) internal successors, (3417), 1306 states have internal predecessors, (3417), 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 21:43:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 3417 transitions. [2022-03-15 21:43:23,006 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 3417 transitions. Word has length 30 [2022-03-15 21:43:23,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:23,006 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 3417 transitions. [2022-03-15 21:43:23,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 22 states have internal predecessors, (42), 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 21:43:23,006 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 3417 transitions. [2022-03-15 21:43:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:23,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:23,008 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:23,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-03-15 21:43:23,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:23,208 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:23,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:23,208 INFO L85 PathProgramCache]: Analyzing trace with hash 553648357, now seen corresponding path program 187 times [2022-03-15 21:43:23,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:23,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634977705] [2022-03-15 21:43:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:23,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:23,400 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 49 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:23,400 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:23,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634977705] [2022-03-15 21:43:23,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634977705] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:23,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100688977] [2022-03-15 21:43:23,400 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:43:23,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:23,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:23,401 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:23,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-15 21:43:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:23,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:43:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:24,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:24,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100688977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:24,882 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:24,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 64 [2022-03-15 21:43:24,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [547636917] [2022-03-15 21:43:24,883 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:24,884 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:24,889 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 50 transitions. [2022-03-15 21:43:24,889 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:25,195 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [538605#(< j1 M1), 538603#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 538604#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 538601#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 538602#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:43:25,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:43:25,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:43:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=719, Invalid=4111, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:43:25,195 INFO L87 Difference]: Start difference. First operand 1307 states and 3417 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 21:43:26,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:26,325 INFO L93 Difference]: Finished difference Result 2251 states and 5110 transitions. [2022-03-15 21:43:26,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-15 21:43:26,325 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 30 [2022-03-15 21:43:26,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:26,328 INFO L225 Difference]: With dead ends: 2251 [2022-03-15 21:43:26,328 INFO L226 Difference]: Without dead ends: 2241 [2022-03-15 21:43:26,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2175, Invalid=10257, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 21:43:26,329 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 240 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:26,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 0 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:43:26,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2241 states. [2022-03-15 21:43:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2241 to 1310. [2022-03-15 21:43:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1310 states, 1309 states have (on average 2.614209320091673) internal successors, (3422), 1309 states have internal predecessors, (3422), 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 21:43:26,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1310 states to 1310 states and 3422 transitions. [2022-03-15 21:43:26,344 INFO L78 Accepts]: Start accepts. Automaton has 1310 states and 3422 transitions. Word has length 30 [2022-03-15 21:43:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:26,344 INFO L470 AbstractCegarLoop]: Abstraction has 1310 states and 3422 transitions. [2022-03-15 21:43:26,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 21:43:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1310 states and 3422 transitions. [2022-03-15 21:43:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:26,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:26,345 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:26,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:26,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-15 21:43:26,545 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:26,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:26,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1553135763, now seen corresponding path program 188 times [2022-03-15 21:43:26,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:26,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328384110] [2022-03-15 21:43:26,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:26,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:26,749 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:26,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328384110] [2022-03-15 21:43:26,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328384110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:26,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544291886] [2022-03-15 21:43:26,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:43:26,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:26,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:26,750 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:26,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-15 21:43:26,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:43:26,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:26,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:43:26,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:27,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:28,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544291886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:28,279 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:28,279 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 24] total 65 [2022-03-15 21:43:28,279 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1375789899] [2022-03-15 21:43:28,279 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:28,280 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:28,285 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 54 transitions. [2022-03-15 21:43:28,285 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:28,715 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [543804#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 543803#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 543710#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 543801#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 543805#(< j1 M1), 543802#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2))] [2022-03-15 21:43:28,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:43:28,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:28,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:43:28,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=4269, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:43:28,716 INFO L87 Difference]: Start difference. First operand 1310 states and 3422 transitions. Second operand has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 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 21:43:29,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:29,999 INFO L93 Difference]: Finished difference Result 2193 states and 4998 transitions. [2022-03-15 21:43:29,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:43:29,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 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 30 [2022-03-15 21:43:29,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:30,001 INFO L225 Difference]: With dead ends: 2193 [2022-03-15 21:43:30,001 INFO L226 Difference]: Without dead ends: 2181 [2022-03-15 21:43:30,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2178, Invalid=10478, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 21:43:30,002 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 278 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:30,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 0 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:43:30,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2022-03-15 21:43:30,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 1307. [2022-03-15 21:43:30,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 2.610260336906585) internal successors, (3409), 1306 states have internal predecessors, (3409), 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 21:43:30,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 3409 transitions. [2022-03-15 21:43:30,017 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 3409 transitions. Word has length 30 [2022-03-15 21:43:30,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:30,017 INFO L470 AbstractCegarLoop]: Abstraction has 1307 states and 3409 transitions. [2022-03-15 21:43:30,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7777777777777777) internal successors, (48), 26 states have internal predecessors, (48), 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 21:43:30,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 3409 transitions. [2022-03-15 21:43:30,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:30,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:30,018 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:30,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:30,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-15 21:43:30,219 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:30,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:30,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1856033253, now seen corresponding path program 189 times [2022-03-15 21:43:30,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:30,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155114756] [2022-03-15 21:43:30,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:30,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:30,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:30,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:30,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155114756] [2022-03-15 21:43:30,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155114756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:30,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767270955] [2022-03-15 21:43:30,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:43:30,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:30,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:30,437 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:30,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-15 21:43:30,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 21:43:30,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:30,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 21:43:30,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:31,170 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:31,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:32,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767270955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:32,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:32,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 24] total 68 [2022-03-15 21:43:32,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2054111439] [2022-03-15 21:43:32,018 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:32,019 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:32,025 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 58 transitions. [2022-03-15 21:43:32,025 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:32,508 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [548940#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 548941#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 548942#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 548945#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 548944#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 548946#(< j1 M1), 548943#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:43:32,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:43:32,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:32,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:43:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=4939, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:43:32,509 INFO L87 Difference]: Start difference. First operand 1307 states and 3409 transitions. Second operand has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 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 21:43:33,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:33,896 INFO L93 Difference]: Finished difference Result 2083 states and 4782 transitions. [2022-03-15 21:43:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:43:33,896 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 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 30 [2022-03-15 21:43:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:33,899 INFO L225 Difference]: With dead ends: 2083 [2022-03-15 21:43:33,899 INFO L226 Difference]: Without dead ends: 2069 [2022-03-15 21:43:33,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3925 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2255, Invalid=11085, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 21:43:33,901 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 281 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:33,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 0 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:43:33,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2022-03-15 21:43:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1298. [2022-03-15 21:43:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.604471858134156) internal successors, (3378), 1297 states have internal predecessors, (3378), 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 21:43:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 3378 transitions. [2022-03-15 21:43:33,921 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 3378 transitions. Word has length 30 [2022-03-15 21:43:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:33,921 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 3378 transitions. [2022-03-15 21:43:33,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 28 states have internal predecessors, (51), 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 21:43:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 3378 transitions. [2022-03-15 21:43:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:33,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:33,922 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:33,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:34,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-15 21:43:34,124 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:34,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:34,125 INFO L85 PathProgramCache]: Analyzing trace with hash 166090349, now seen corresponding path program 190 times [2022-03-15 21:43:34,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:34,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295825131] [2022-03-15 21:43:34,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:34,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:34,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:34,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295825131] [2022-03-15 21:43:34,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295825131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:34,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495529836] [2022-03-15 21:43:34,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:43:34,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:34,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:34,355 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:34,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-15 21:43:34,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:43:34,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:34,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:43:34,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:34,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:35,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495529836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:35,787 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:35,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 67 [2022-03-15 21:43:35,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1846330001] [2022-03-15 21:43:35,787 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:35,788 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:35,794 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 62 transitions. [2022-03-15 21:43:35,794 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:36,329 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [553955#(< j1 M1), 553949#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 553950#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 553954#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 553948#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 553953#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 553951#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 553952#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4)))] [2022-03-15 21:43:36,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:43:36,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:36,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:43:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=4915, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:43:36,330 INFO L87 Difference]: Start difference. First operand 1298 states and 3378 transitions. Second operand has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 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 21:43:37,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:37,560 INFO L93 Difference]: Finished difference Result 1927 states and 4474 transitions. [2022-03-15 21:43:37,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:43:37,560 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 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 30 [2022-03-15 21:43:37,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:37,563 INFO L225 Difference]: With dead ends: 1927 [2022-03-15 21:43:37,563 INFO L226 Difference]: Without dead ends: 1911 [2022-03-15 21:43:37,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2044, Invalid=10388, Unknown=0, NotChecked=0, Total=12432 [2022-03-15 21:43:37,564 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 297 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:37,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 0 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:43:37,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-03-15 21:43:37,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1283. [2022-03-15 21:43:37,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1283 states, 1282 states have (on average 2.5967238689547583) internal successors, (3329), 1282 states have internal predecessors, (3329), 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 21:43:37,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 3329 transitions. [2022-03-15 21:43:37,577 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 3329 transitions. Word has length 30 [2022-03-15 21:43:37,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:37,577 INFO L470 AbstractCegarLoop]: Abstraction has 1283 states and 3329 transitions. [2022-03-15 21:43:37,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 30 states have internal predecessors, (54), 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 21:43:37,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 3329 transitions. [2022-03-15 21:43:37,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:37,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:37,578 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:37,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-03-15 21:43:37,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:37,779 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:37,779 INFO L85 PathProgramCache]: Analyzing trace with hash -682532123, now seen corresponding path program 191 times [2022-03-15 21:43:37,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:37,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411721931] [2022-03-15 21:43:37,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:37,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:37,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 53 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:38,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:38,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411721931] [2022-03-15 21:43:38,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411721931] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:38,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153152989] [2022-03-15 21:43:38,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:43:38,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:38,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:38,025 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:38,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-15 21:43:38,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 21:43:38,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:38,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:43:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:38,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:39,510 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:39,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153152989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:39,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:39,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 68 [2022-03-15 21:43:39,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [320923811] [2022-03-15 21:43:39,510 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:39,512 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:39,517 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 66 transitions. [2022-03-15 21:43:39,517 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:40,165 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [558770#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 558769#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 558767#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 558768#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 558766#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 558772#(< j1 M1), 558771#(or (<= (+ 9 j2) M2) (<= counter 7) (<= M2 (+ 7 j2))), 558764#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 558765#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2))] [2022-03-15 21:43:40,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:43:40,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:40,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:43:40,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=5175, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:43:40,166 INFO L87 Difference]: Start difference. First operand 1283 states and 3329 transitions. Second operand has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 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 21:43:41,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:41,322 INFO L93 Difference]: Finished difference Result 1731 states and 4086 transitions. [2022-03-15 21:43:41,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:43:41,323 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 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 30 [2022-03-15 21:43:41,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:41,325 INFO L225 Difference]: With dead ends: 1731 [2022-03-15 21:43:41,325 INFO L226 Difference]: Without dead ends: 1713 [2022-03-15 21:43:41,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3972 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1813, Invalid=9743, Unknown=0, NotChecked=0, Total=11556 [2022-03-15 21:43:41,325 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 285 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:41,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 0 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:43:41,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2022-03-15 21:43:41,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1262. [2022-03-15 21:43:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 2.5868358445678035) internal successors, (3262), 1261 states have internal predecessors, (3262), 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 21:43:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 3262 transitions. [2022-03-15 21:43:41,337 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 3262 transitions. Word has length 30 [2022-03-15 21:43:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:41,338 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 3262 transitions. [2022-03-15 21:43:41,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 32 states have internal predecessors, (57), 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 21:43:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 3262 transitions. [2022-03-15 21:43:41,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:41,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:41,339 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:41,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-03-15 21:43:41,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:41,539 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:41,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:41,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1220024979, now seen corresponding path program 192 times [2022-03-15 21:43:41,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:41,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116613898] [2022-03-15 21:43:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:41,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:41,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:41,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:41,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116613898] [2022-03-15 21:43:41,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116613898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:41,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335104226] [2022-03-15 21:43:41,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:43:41,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:41,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:41,796 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:41,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-15 21:43:41,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 21:43:41,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:41,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:43:41,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:42,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:43,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335104226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:43,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:43,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2022-03-15 21:43:43,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [115950962] [2022-03-15 21:43:43,249 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:43,251 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:43,285 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 70 transitions. [2022-03-15 21:43:43,285 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:44,062 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [563333#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 563337#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 563340#(< j1 M1), 563335#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 563339#(or (<= M2 (+ j2 8)) (<= counter 8) (<= (+ j2 10) M2)), 563336#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 563241#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 563332#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 563334#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2))), 563338#(or (<= (+ 9 j2) M2) (<= counter 7) (<= M2 (+ 7 j2)))] [2022-03-15 21:43:44,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-15 21:43:44,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-15 21:43:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=5303, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 21:43:44,063 INFO L87 Difference]: Start difference. First operand 1262 states and 3262 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 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 21:43:45,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:45,207 INFO L93 Difference]: Finished difference Result 1480 states and 3566 transitions. [2022-03-15 21:43:45,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:43:45,207 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 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) Word has length 30 [2022-03-15 21:43:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:45,209 INFO L225 Difference]: With dead ends: 1480 [2022-03-15 21:43:45,209 INFO L226 Difference]: Without dead ends: 1460 [2022-03-15 21:43:45,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3722 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1469, Invalid=8631, Unknown=0, NotChecked=0, Total=10100 [2022-03-15 21:43:45,210 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 257 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:45,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 0 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:43:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-03-15 21:43:45,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1175. [2022-03-15 21:43:45,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 1174 states have (on average 2.5587734241908007) internal successors, (3004), 1174 states have internal predecessors, (3004), 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 21:43:45,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 3004 transitions. [2022-03-15 21:43:45,223 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 3004 transitions. Word has length 30 [2022-03-15 21:43:45,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:45,223 INFO L470 AbstractCegarLoop]: Abstraction has 1175 states and 3004 transitions. [2022-03-15 21:43:45,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 34 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 21:43:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 3004 transitions. [2022-03-15 21:43:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 21:43:45,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:45,224 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:45,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-15 21:43:45,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:45,425 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:45,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:45,425 INFO L85 PathProgramCache]: Analyzing trace with hash -702434331, now seen corresponding path program 193 times [2022-03-15 21:43:45,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:45,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001078747] [2022-03-15 21:43:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:45,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:45,731 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:45,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:45,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001078747] [2022-03-15 21:43:45,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001078747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:45,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467290276] [2022-03-15 21:43:45,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:43:45,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:45,733 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:45,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-15 21:43:45,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:45,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:43:45,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:46,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:47,332 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 55 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:47,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467290276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:47,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:47,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 70 [2022-03-15 21:43:47,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [464626807] [2022-03-15 21:43:47,333 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:47,334 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:47,340 INFO L252 McrAutomatonBuilder]: Finished intersection with 53 states and 74 transitions. [2022-03-15 21:43:47,340 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:48,100 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [567466#(or (<= (+ j2 8) M2) (<= M2 (+ 6 j2)) (<= counter 6)), 567464#(or (<= counter 4) (<= (+ 6 j2) M2) (<= M2 (+ j2 4))), 567465#(or (<= (+ 7 j2) M2) (<= counter 5) (<= M2 (+ 5 j2))), 567469#(or (<= (+ j2 11) M2) (<= counter 9) (<= M2 (+ 9 j2))), 567470#(< j1 M1), 567460#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 567467#(or (<= (+ 9 j2) M2) (<= counter 7) (<= M2 (+ 7 j2))), 567461#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 567468#(or (<= M2 (+ j2 8)) (<= counter 8) (<= (+ j2 10) M2)), 567462#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 567463#(or (<= counter 3) (<= (+ 5 j2) M2) (<= M2 (+ 3 j2)))] [2022-03-15 21:43:48,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-15 21:43:48,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:48,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-15 21:43:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=989, Invalid=5653, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 21:43:48,100 INFO L87 Difference]: Start difference. First operand 1175 states and 3004 transitions. Second operand has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 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 21:43:49,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:49,607 INFO L93 Difference]: Finished difference Result 1445 states and 3421 transitions. [2022-03-15 21:43:49,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:43:49,607 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 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 30 [2022-03-15 21:43:49,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:49,609 INFO L225 Difference]: With dead ends: 1445 [2022-03-15 21:43:49,609 INFO L226 Difference]: Without dead ends: 1403 [2022-03-15 21:43:49,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4359 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2223, Invalid=11117, Unknown=0, NotChecked=0, Total=13340 [2022-03-15 21:43:49,609 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 233 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:49,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 0 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:43:49,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2022-03-15 21:43:49,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1197. [2022-03-15 21:43:49,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.5576923076923075) internal successors, (3059), 1196 states have internal predecessors, (3059), 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 21:43:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3059 transitions. [2022-03-15 21:43:49,620 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3059 transitions. Word has length 30 [2022-03-15 21:43:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:49,620 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 3059 transitions. [2022-03-15 21:43:49,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 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 21:43:49,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3059 transitions. [2022-03-15 21:43:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:43:49,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:49,622 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:49,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:49,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-03-15 21:43:49,831 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:49,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:49,831 INFO L85 PathProgramCache]: Analyzing trace with hash 308151906, now seen corresponding path program 194 times [2022-03-15 21:43:49,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:49,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112949426] [2022-03-15 21:43:49,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:49,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:50,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:50,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112949426] [2022-03-15 21:43:50,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112949426] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:50,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594161629] [2022-03-15 21:43:50,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:43:50,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:50,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:50,083 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:50,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-15 21:43:50,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:43:50,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:50,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 50 conjunts are in the unsatisfiable core [2022-03-15 21:43:50,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:50,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 66 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:51,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594161629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:51,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:51,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 73 [2022-03-15 21:43:51,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [685043940] [2022-03-15 21:43:51,526 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:51,527 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:51,543 INFO L252 McrAutomatonBuilder]: Finished intersection with 69 states and 105 transitions. [2022-03-15 21:43:51,543 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:52,655 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 25 new interpolants: [571640#(or (< j1 M1) (<= (+ j2 8) M2)), 571643#(or (< j1 M1) (<= (+ j2 11) M2)), 571652#(or (< (+ j1 8) M1) (<= M1 (+ 7 j1)) (<= (+ j2 12) M2)), 571650#(or (<= M1 (+ 5 j1)) (<= (+ j2 12) M2) (< (+ 6 j1) M1)), 571639#(or (<= (+ 7 j2) M2) (< j1 M1)), 571633#(or (< j1 M1) (<= (+ j2 1) M2)), 571644#(or (< j1 M1) (<= (+ j2 12) M2)), 571654#(or (< (+ j1 10) M1) (<= (+ j2 12) M2) (<= M1 (+ 9 j1))), 571653#(or (< (+ 9 j1) M1) (<= M1 (+ j1 8)) (<= (+ j2 12) M2)), 571638#(or (<= (+ 6 j2) M2) (< j1 M1)), 571632#(< j1 M1), 571648#(or (<= M1 (+ 3 j1)) (< (+ j1 4) M1) (<= (+ j2 12) M2)), 571635#(or (< j1 M1) (<= (+ 3 j2) M2)), 571647#(or (<= M1 (+ 2 j1)) (< (+ 3 j1) M1) (<= (+ j2 12) M2)), 571634#(or (< j1 M1) (<= (+ 2 j2) M2)), 571636#(or (< j1 M1) (<= (+ j2 4) M2)), 571651#(or (< (+ 7 j1) M1) (<= (+ j2 12) M2) (<= M1 (+ 6 j1))), 571641#(or (<= (+ 9 j2) M2) (< j1 M1)), 571642#(or (< j1 M1) (<= (+ j2 10) M2)), 571656#(or (< (+ j1 12) M1) (<= M1 (+ j1 11)) (<= (+ j2 12) M2)), 571646#(or (< (+ 2 j1) M1) (<= M1 (+ j1 1)) (<= (+ j2 12) M2)), 571649#(or (< (+ 5 j1) M1) (<= M1 (+ j1 4)) (<= (+ j2 12) M2)), 571637#(or (< j1 M1) (<= (+ 5 j2) M2)), 571655#(or (< (+ j1 11) M1) (<= M1 (+ j1 10)) (<= (+ j2 12) M2)), 571645#(or (< (+ j1 1) M1) (<= (+ j2 12) M2) (<= M1 j1))] [2022-03-15 21:43:52,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-15 21:43:52,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-15 21:43:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=8049, Unknown=0, NotChecked=0, Total=9702 [2022-03-15 21:43:52,656 INFO L87 Difference]: Start difference. First operand 1197 states and 3059 transitions. Second operand has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 51 states have internal predecessors, (93), 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 21:43:54,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:54,183 INFO L93 Difference]: Finished difference Result 1600 states and 3733 transitions. [2022-03-15 21:43:54,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:43:54,183 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 51 states have internal predecessors, (93), 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 31 [2022-03-15 21:43:54,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:54,185 INFO L225 Difference]: With dead ends: 1600 [2022-03-15 21:43:54,185 INFO L226 Difference]: Without dead ends: 1520 [2022-03-15 21:43:54,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7586 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4510, Invalid=16370, Unknown=0, NotChecked=0, Total=20880 [2022-03-15 21:43:54,186 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 258 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:54,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 0 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:43:54,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1520 states. [2022-03-15 21:43:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1520 to 1191. [2022-03-15 21:43:54,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 2.5521008403361343) internal successors, (3037), 1190 states have internal predecessors, (3037), 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 21:43:54,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3037 transitions. [2022-03-15 21:43:54,198 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3037 transitions. Word has length 31 [2022-03-15 21:43:54,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:54,198 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 3037 transitions. [2022-03-15 21:43:54,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 51 states have internal predecessors, (93), 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 21:43:54,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3037 transitions. [2022-03-15 21:43:54,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 21:43:54,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:54,199 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:54,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-15 21:43:54,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:54,399 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:54,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1737692710, now seen corresponding path program 195 times [2022-03-15 21:43:54,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:54,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036189922] [2022-03-15 21:43:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:54,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:54,564 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 67 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:54,564 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:54,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036189922] [2022-03-15 21:43:54,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036189922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:54,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733191286] [2022-03-15 21:43:54,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:43:54,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:54,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:54,565 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:54,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-15 21:43:54,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 21:43:54,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:54,605 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 74 conjunts are in the unsatisfiable core [2022-03-15 21:43:54,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:55,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:56,118 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:56,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733191286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:56,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:56,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25, 26] total 63 [2022-03-15 21:43:56,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [481982910] [2022-03-15 21:43:56,119 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:56,120 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:56,126 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 59 transitions. [2022-03-15 21:43:56,126 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:56,586 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [575976#(and (or (<= M1 (+ j1 1)) (<= (+ 9 j2) j1)) (or (<= M1 (+ j1 1)) (= (+ (* (- 1) M1) M2) 0))), 575980#(and (or (<= (+ 5 j2) j1) (<= M1 (+ 5 j1))) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 5 j1)))), 575982#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 7 j1))) (or (<= (+ 3 j2) j1) (<= M1 (+ 7 j1)))), 575985#(and (or (<= j2 j1) (<= M1 (+ j1 10))) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 10)))), 575977#(and (or (<= M1 (+ 2 j1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= M1 (+ 2 j1)) (<= (+ j2 8) j1))), 575984#(and (or (<= M1 (+ 9 j1)) (<= (+ j2 1) j1)) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 9 j1)))), 575986#(< j2 M2), 575978#(and (or (<= M1 (+ 3 j1)) (<= (+ 7 j2) j1)) (or (<= M1 (+ 3 j1)) (= (+ (* (- 1) M1) M2) 0))), 575979#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 4))) (or (<= (+ 6 j2) j1) (<= M1 (+ j1 4)))), 575981#(and (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ 6 j1))) (or (<= (+ j2 4) j1) (<= M1 (+ 6 j1)))), 575975#(and (or (<= (+ j2 10) j1) (<= M1 j1)) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 j1))), 575983#(and (or (<= (+ 2 j2) j1) (<= M1 (+ j1 8))) (or (= (+ (* (- 1) M1) M2) 0) (<= M1 (+ j1 8))))] [2022-03-15 21:43:56,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:43:56,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:43:56,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1322, Invalid=4378, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:43:56,587 INFO L87 Difference]: Start difference. First operand 1191 states and 3037 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 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 21:43:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:57,259 INFO L93 Difference]: Finished difference Result 1328 states and 3282 transitions. [2022-03-15 21:43:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 21:43:57,259 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 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 31 [2022-03-15 21:43:57,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:57,261 INFO L225 Difference]: With dead ends: 1328 [2022-03-15 21:43:57,261 INFO L226 Difference]: Without dead ends: 1327 [2022-03-15 21:43:57,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3988 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2987, Invalid=9003, Unknown=0, NotChecked=0, Total=11990 [2022-03-15 21:43:57,262 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 99 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:57,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 0 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:43:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2022-03-15 21:43:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 1191. [2022-03-15 21:43:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 2.5512605042016805) internal successors, (3036), 1190 states have internal predecessors, (3036), 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 21:43:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3036 transitions. [2022-03-15 21:43:57,273 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3036 transitions. Word has length 31 [2022-03-15 21:43:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:57,273 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 3036 transitions. [2022-03-15 21:43:57,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 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 21:43:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3036 transitions. [2022-03-15 21:43:57,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 21:43:57,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:57,274 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:57,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:57,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:57,475 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:57,475 INFO L85 PathProgramCache]: Analyzing trace with hash 962632091, now seen corresponding path program 196 times [2022-03-15 21:43:57,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:57,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509111575] [2022-03-15 21:43:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:57,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:57,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:57,636 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:57,637 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:57,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509111575] [2022-03-15 21:43:57,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509111575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:57,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860584820] [2022-03-15 21:43:57,637 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:43:57,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:57,638 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:57,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-15 21:43:57,665 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:43:57,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:57,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-15 21:43:57,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:57,762 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:57,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 78 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:58,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860584820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:58,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:58,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 25] total 37 [2022-03-15 21:43:58,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1206835591] [2022-03-15 21:43:58,288 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:58,289 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:58,298 INFO L252 McrAutomatonBuilder]: Finished intersection with 72 states and 110 transitions. [2022-03-15 21:43:58,298 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:58,881 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:43:58,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:43:58,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:58,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:43:58,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:43:58,882 INFO L87 Difference]: Start difference. First operand 1191 states and 3036 transitions. Second operand has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 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 21:43:59,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:59,276 INFO L93 Difference]: Finished difference Result 1628 states and 3961 transitions. [2022-03-15 21:43:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:43:59,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 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 32 [2022-03-15 21:43:59,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:59,279 INFO L225 Difference]: With dead ends: 1628 [2022-03-15 21:43:59,279 INFO L226 Difference]: Without dead ends: 1598 [2022-03-15 21:43:59,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=375, Invalid=1107, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:43:59,279 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 46 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:59,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 0 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:43:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1598 states. [2022-03-15 21:43:59,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1598 to 1372. [2022-03-15 21:43:59,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1372 states, 1371 states have (on average 2.584974471188913) internal successors, (3544), 1371 states have internal predecessors, (3544), 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 21:43:59,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 3544 transitions. [2022-03-15 21:43:59,292 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 3544 transitions. Word has length 32 [2022-03-15 21:43:59,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:59,292 INFO L470 AbstractCegarLoop]: Abstraction has 1372 states and 3544 transitions. [2022-03-15 21:43:59,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.533333333333333) internal successors, (68), 15 states have internal predecessors, (68), 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 21:43:59,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 3544 transitions. [2022-03-15 21:43:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 21:43:59,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:59,294 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:59,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:59,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:59,494 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:59,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:59,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1823556281, now seen corresponding path program 197 times [2022-03-15 21:43:59,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:59,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904278537] [2022-03-15 21:43:59,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:59,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:59,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:59,777 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:59,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904278537] [2022-03-15 21:43:59,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904278537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:59,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752816786] [2022-03-15 21:43:59,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:43:59,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:59,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:59,778 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:43:59,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-15 21:43:59,811 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 21:43:59,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:59,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-15 21:43:59,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:44:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:00,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:44:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:05,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752816786] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:44:05,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:44:05,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26, 26] total 66 [2022-03-15 21:44:05,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [718258597] [2022-03-15 21:44:05,931 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:44:05,933 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:44:05,939 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 60 transitions. [2022-03-15 21:44:05,940 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:44:06,878 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [584618#(and (or (not (< (+ 3 j1) M1)) (<= counter 7)) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= 7 counter)) (or (<= (+ 7 j2) j1) (not (< (+ 3 j1) M1)))), 584620#(and (or (not (< (+ 5 j1) M1)) (<= counter 5)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ 5 j2) j1)) (or (not (< (+ 5 j1) M1)) (<= 5 counter))), 584626#(< j1 M1), 584619#(and (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= counter 6)) (or (not (< (+ j1 4) M1)) (<= (+ 6 j2) j1)) (or (<= 6 counter) (not (< (+ j1 4) M1)))), 584624#(and (or (not (< (+ 9 j1) M1)) (<= (+ j2 1) j1)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 9 j1) M1))) (or (not (< (+ 9 j1) M1)) (<= 1 counter)) (or (not (< (+ 9 j1) M1)) (<= counter 1))), 584625#(and (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 10) M1))) (or (<= j2 j1) (not (< (+ j1 10) M1))) (or (not (< (+ j1 10) M1)) (<= 0 counter)) (or (<= counter 0) (not (< (+ j1 10) M1)))), 584615#(and (or (not (< j1 M1)) (<= 10 counter)) (or (not (< j1 M1)) (<= counter 10)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= (+ j2 10) j1))), 584616#(and (or (<= 9 counter) (not (< (+ j1 1) M1))) (or (<= (+ 9 j2) j1) (not (< (+ j1 1) M1))) (or (<= counter 9) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 584621#(and (or (not (< (+ 6 j1) M1)) (<= 4 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= counter 4) (not (< (+ 6 j1) M1))) (or (<= (+ j2 4) j1) (not (< (+ 6 j1) M1)))), 584622#(and (or (not (< (+ 7 j1) M1)) (<= (+ 3 j2) j1)) (or (not (< (+ 7 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 7 j1) M1)) (<= counter 3)) (or (not (< (+ 7 j1) M1)) (<= 3 counter))), 584627#(or (< (+ j1 1) M1) (<= M1 j1)), 584617#(and (or (not (< (+ 2 j1) M1)) (<= 8 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= counter 8) (not (< (+ 2 j1) M1))) (or (<= (+ j2 8) j1) (not (< (+ 2 j1) M1)))), 584623#(and (or (not (< (+ j1 8) M1)) (<= (+ 2 j2) j1)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 8) M1))) (or (not (< (+ j1 8) M1)) (<= 2 counter)) (or (<= counter 2) (not (< (+ j1 8) M1))))] [2022-03-15 21:44:06,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:44:06,878 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:44:06,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:44:06,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=5088, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:44:06,878 INFO L87 Difference]: Start difference. First operand 1372 states and 3544 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 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 21:44:11,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:44:11,310 INFO L93 Difference]: Finished difference Result 2286 states and 5274 transitions. [2022-03-15 21:44:11,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-15 21:44:11,310 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 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 32 [2022-03-15 21:44:11,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:44:11,313 INFO L225 Difference]: With dead ends: 2286 [2022-03-15 21:44:11,313 INFO L226 Difference]: Without dead ends: 2283 [2022-03-15 21:44:11,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2769, Invalid=11273, Unknown=0, NotChecked=0, Total=14042 [2022-03-15 21:44:11,313 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 261 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 2030 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 2030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:44:11,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 0 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 2030 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:44:11,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-03-15 21:44:11,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1362. [2022-03-15 21:44:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1362 states, 1361 states have (on average 2.590742101396032) internal successors, (3526), 1361 states have internal predecessors, (3526), 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 21:44:11,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1362 states to 1362 states and 3526 transitions. [2022-03-15 21:44:11,328 INFO L78 Accepts]: Start accepts. Automaton has 1362 states and 3526 transitions. Word has length 32 [2022-03-15 21:44:11,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:44:11,328 INFO L470 AbstractCegarLoop]: Abstraction has 1362 states and 3526 transitions. [2022-03-15 21:44:11,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 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 21:44:11,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1362 states and 3526 transitions. [2022-03-15 21:44:11,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 21:44:11,330 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:44:11,330 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:44:11,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Forceful destruction successful, exit code 0 [2022-03-15 21:44:11,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:44:11,530 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:44:11,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:44:11,530 INFO L85 PathProgramCache]: Analyzing trace with hash -761899831, now seen corresponding path program 198 times [2022-03-15 21:44:11,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:44:11,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841935399] [2022-03-15 21:44:11,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:44:11,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:44:11,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:11,811 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:44:11,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841935399] [2022-03-15 21:44:11,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841935399] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:44:11,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324418539] [2022-03-15 21:44:11,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:44:11,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:44:11,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:44:11,812 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:44:11,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-15 21:44:11,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 21:44:11,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:44:11,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 21:44:11,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:44:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:12,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:44:16,840 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 1 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:16,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324418539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:44:16,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:44:16,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 67 [2022-03-15 21:44:16,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [298436949] [2022-03-15 21:44:16,840 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:44:16,842 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:44:16,848 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 60 transitions. [2022-03-15 21:44:16,848 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:44:17,705 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [589979#(and (or (<= counter 0) (not (< (+ 9 j1) M1))) (or (<= 0 counter) (not (< (+ 9 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 9 j1) M1))) (or (<= j2 j1) (not (< (+ 9 j1) M1)))), 589981#(< j1 M1), 589974#(and (or (not (< (+ j1 4) M1)) (<= 5 counter)) (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= counter 5)) (or (not (< (+ j1 4) M1)) (<= (+ 5 j2) j1))), 589970#(and (or (not (< j1 M1)) (<= (+ 9 j2) j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= counter 9)) (or (not (< j1 M1)) (<= 9 counter))), 589975#(and (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ j2 4) j1)) (or (<= counter 4) (not (< (+ 5 j1) M1))) (or (not (< (+ 5 j1) M1)) (<= 4 counter))), 589980#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 589977#(and (or (not (< (+ 7 j1) M1)) (<= 2 counter)) (or (not (< (+ 7 j1) M1)) (<= counter 2)) (or (not (< (+ 7 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 7 j1) M1)) (<= (+ 2 j2) j1))), 589978#(and (or (not (< (+ j1 8) M1)) (<= counter 1)) (or (not (< (+ j1 8) M1)) (<= 1 counter)) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 8) M1))) (or (not (< (+ j1 8) M1)) (<= (+ j2 1) j1))), 589971#(and (or (<= (+ j2 8) j1) (not (< (+ j1 1) M1))) (or (not (< (+ j1 1) M1)) (<= 8 counter)) (or (<= counter 8) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 589973#(and (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= (+ 6 j2) j1)) (or (not (< (+ 3 j1) M1)) (<= counter 6)) (or (<= 6 counter) (not (< (+ 3 j1) M1)))), 589972#(and (or (not (< (+ 2 j1) M1)) (<= 7 counter)) (or (<= (+ 7 j2) j1) (not (< (+ 2 j1) M1))) (or (<= counter 7) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 589976#(and (or (<= counter 3) (not (< (+ 6 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= 3 counter) (not (< (+ 6 j1) M1))) (or (<= (+ 3 j2) j1) (not (< (+ 6 j1) M1))))] [2022-03-15 21:44:17,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:44:17,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:44:17,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:44:17,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=5167, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:44:17,706 INFO L87 Difference]: Start difference. First operand 1362 states and 3526 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 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 21:44:26,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:44:26,423 INFO L93 Difference]: Finished difference Result 3593 states and 7618 transitions. [2022-03-15 21:44:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-15 21:44:26,423 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 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 32 [2022-03-15 21:44:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:44:26,427 INFO L225 Difference]: With dead ends: 3593 [2022-03-15 21:44:26,427 INFO L226 Difference]: Without dead ends: 3589 [2022-03-15 21:44:26,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5941 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=5231, Invalid=24181, Unknown=0, NotChecked=0, Total=29412 [2022-03-15 21:44:26,428 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 491 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:44:26,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 0 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 21:44:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3589 states. [2022-03-15 21:44:26,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3589 to 1352. [2022-03-15 21:44:26,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1352 states, 1351 states have (on average 2.5943745373797187) internal successors, (3505), 1351 states have internal predecessors, (3505), 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 21:44:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 3505 transitions. [2022-03-15 21:44:26,448 INFO L78 Accepts]: Start accepts. Automaton has 1352 states and 3505 transitions. Word has length 32 [2022-03-15 21:44:26,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:44:26,448 INFO L470 AbstractCegarLoop]: Abstraction has 1352 states and 3505 transitions. [2022-03-15 21:44:26,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 states have internal predecessors, (58), 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 21:44:26,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1352 states and 3505 transitions. [2022-03-15 21:44:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 21:44:26,449 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:44:26,450 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:44:26,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-15 21:44:26,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-15 21:44:26,650 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:44:26,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:44:26,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1525978553, now seen corresponding path program 199 times [2022-03-15 21:44:26,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:44:26,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169848797] [2022-03-15 21:44:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:44:26,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:44:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:26,954 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 3 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:26,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:44:26,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169848797] [2022-03-15 21:44:26,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169848797] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:44:26,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166237073] [2022-03-15 21:44:26,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:44:26,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:44:26,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:44:26,955 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:44:26,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-15 21:44:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:26,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 21:44:26,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:44:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 3 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:27,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:44:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 3 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:31,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166237073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:44:31,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:44:31,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 26, 26] total 70 [2022-03-15 21:44:31,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1399280577] [2022-03-15 21:44:31,417 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:44:31,418 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:44:31,425 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 62 transitions. [2022-03-15 21:44:31,425 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:44:32,314 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [596731#(< j1 M1), 596729#(and (or (not (< (+ 7 j1) M1)) (<= 1 counter)) (or (not (< (+ 7 j1) M1)) (<= counter 1)) (or (not (< (+ 7 j1) M1)) (<= (+ j2 1) j1)) (or (not (< (+ 7 j1) M1)) (= (+ (* (- 1) M1) M2) 0))), 596723#(and (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= counter 5)) (or (not (< (+ 3 j1) M1)) (<= 5 counter)) (or (not (< (+ 3 j1) M1)) (<= (+ 5 j2) j1))), 596730#(and (or (not (< (+ j1 8) M1)) (<= 0 counter)) (or (<= j2 j1) (not (< (+ j1 8) M1))) (or (<= counter 0) (not (< (+ j1 8) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 8) M1)))), 596727#(and (or (not (< (+ 5 j1) M1)) (<= 3 counter)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= counter 3)) (or (not (< (+ 5 j1) M1)) (<= (+ 3 j2) j1))), 596724#(or (<= M2 j2) (<= (+ 2 j2) M2) (not (< 0 counter))), 596722#(and (or (not (< (+ 2 j1) M1)) (<= counter 6)) (or (<= (+ 6 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1))) (or (<= 6 counter) (not (< (+ 2 j1) M1)))), 596726#(and (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (<= counter 4) (not (< (+ j1 4) M1))) (or (not (< (+ j1 4) M1)) (<= (+ j2 4) j1)) (or (not (< (+ j1 4) M1)) (<= 4 counter))), 596725#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 596728#(and (or (<= 2 counter) (not (< (+ 6 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= (+ 2 j2) j1) (not (< (+ 6 j1) M1))) (or (<= counter 2) (not (< (+ 6 j1) M1)))), 596720#(and (or (not (< j1 M1)) (<= counter 8)) (or (not (< j1 M1)) (<= 8 counter)) (or (not (< j1 M1)) (<= (+ j2 8) j1)) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0))), 596721#(and (or (not (< (+ j1 1) M1)) (<= 7 counter)) (or (<= counter 7) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1))) (or (<= (+ 7 j2) j1) (not (< (+ j1 1) M1))))] [2022-03-15 21:44:32,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-15 21:44:32,314 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:44:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-15 21:44:32,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1122, Invalid=5684, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:44:32,315 INFO L87 Difference]: Start difference. First operand 1352 states and 3505 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 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 21:44:40,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:44:40,822 INFO L93 Difference]: Finished difference Result 4013 states and 8369 transitions. [2022-03-15 21:44:40,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-03-15 21:44:40,823 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 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 32 [2022-03-15 21:44:40,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:44:40,827 INFO L225 Difference]: With dead ends: 4013 [2022-03-15 21:44:40,827 INFO L226 Difference]: Without dead ends: 4007 [2022-03-15 21:44:40,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7208 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=5718, Invalid=27224, Unknown=0, NotChecked=0, Total=32942 [2022-03-15 21:44:40,828 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 493 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:44:40,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 0 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:44:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2022-03-15 21:44:40,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 1353. [2022-03-15 21:44:40,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1352 states have (on average 2.598372781065089) internal successors, (3513), 1352 states have internal predecessors, (3513), 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 21:44:40,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 3513 transitions. [2022-03-15 21:44:40,849 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 3513 transitions. Word has length 32 [2022-03-15 21:44:40,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:44:40,849 INFO L470 AbstractCegarLoop]: Abstraction has 1353 states and 3513 transitions. [2022-03-15 21:44:40,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 31 states have internal predecessors, (59), 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 21:44:40,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 3513 transitions. [2022-03-15 21:44:40,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 21:44:40,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:44:40,850 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:44:40,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Forceful destruction successful, exit code 0 [2022-03-15 21:44:41,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-15 21:44:41,050 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:44:41,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:44:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash 738149321, now seen corresponding path program 200 times [2022-03-15 21:44:41,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:44:41,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254130027] [2022-03-15 21:44:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:44:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:44:41,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:41,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:44:41,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254130027] [2022-03-15 21:44:41,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254130027] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:44:41,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945311493] [2022-03-15 21:44:41,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:44:41,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:44:41,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:44:41,348 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 21:44:41,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-15 21:44:41,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:44:41,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:44:41,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-15 21:44:41,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:44:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:42,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:44:44,977 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:44,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945311493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:44:44,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:44:44,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 26, 26] total 69 [2022-03-15 21:44:44,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2002208635] [2022-03-15 21:44:44,978 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:44:44,979 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:44:44,986 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 64 transitions. [2022-03-15 21:44:44,986 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:44:45,864 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [603806#(or (not (< j2 M2)) (<= (+ 2 j2) M2) (not (< 0 counter))), 603911#(or (<= counter 1) (<= M2 (+ j2 1)) (<= (+ 3 j2) M2)), 603908#(and (or (not (< (+ 3 j1) M1)) (<= (+ j2 4) j1)) (or (<= counter 4) (not (< (+ 3 j1) M1))) (or (not (< (+ 3 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 3 j1) M1)) (<= 4 counter))), 603912#(or (<= counter 2) (<= M2 (+ 2 j2)) (<= (+ j2 4) M2)), 603915#(< j1 M1), 603907#(and (or (<= 5 counter) (not (< (+ 2 j1) M1))) (or (<= counter 5) (not (< (+ 2 j1) M1))) (or (<= (+ 5 j2) j1) (not (< (+ 2 j1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 2 j1) M1)))), 603913#(and (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ 6 j1) M1))) (or (<= counter 1) (not (< (+ 6 j1) M1))) (or (<= 1 counter) (not (< (+ 6 j1) M1))) (or (not (< (+ 6 j1) M1)) (<= (+ j2 1) j1))), 603914#(and (or (not (< (+ 7 j1) M1)) (<= counter 0)) (or (not (< (+ 7 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 7 j1) M1)) (<= j2 j1)) (or (not (< (+ 7 j1) M1)) (<= 0 counter))), 603909#(and (or (not (< (+ j1 4) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ j1 4) M1)) (<= 3 counter)) (or (not (< (+ j1 4) M1)) (<= counter 3)) (or (not (< (+ j1 4) M1)) (<= (+ 3 j2) j1))), 603905#(and (or (not (< j1 M1)) (<= counter 7)) (or (<= (+ 7 j2) j1) (not (< j1 M1))) (or (not (< j1 M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< j1 M1)) (<= 7 counter))), 603906#(and (or (not (< (+ j1 1) M1)) (<= counter 6)) (or (<= (+ 6 j2) j1) (not (< (+ j1 1) M1))) (or (<= 6 counter) (not (< (+ j1 1) M1))) (or (= (+ (* (- 1) M1) M2) 0) (not (< (+ j1 1) M1)))), 603910#(and (or (not (< (+ 5 j1) M1)) (<= counter 2)) (or (not (< (+ 5 j1) M1)) (= (+ (* (- 1) M1) M2) 0)) (or (not (< (+ 5 j1) M1)) (<= (+ 2 j2) j1)) (or (not (< (+ 5 j1) M1)) (<= 2 counter)))] [2022-03-15 21:44:45,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 21:44:45,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:44:45,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 21:44:45,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1049, Invalid=5431, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:44:45,865 INFO L87 Difference]: Start difference. First operand 1353 states and 3513 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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) Received shutdown request... [2022-03-15 21:44:50,815 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 21:44:50,815 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 21:44:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-15 21:44:50,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4993 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4324, Invalid=18932, Unknown=0, NotChecked=0, Total=23256 [2022-03-15 21:44:50,821 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 213 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:44:50,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 0 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:44:50,821 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 21:44:50,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-03-15 21:44:51,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-15 21:44:51,028 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1353states) and FLOYD_HOARE automaton (currently 81 states, 33 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 153 known predicates. [2022-03-15 21:44:51,029 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 21:44:51,029 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 21:44:51,030 INFO L732 BasicCegarLoop]: Path program histogram: [200, 1, 1] [2022-03-15 21:44:51,032 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 21:44:51,032 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 21:44:51,033 INFO L202 PluginConnector]: Adding new model nonblocking-cntr.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 09:44:51 BasicIcfg [2022-03-15 21:44:51,033 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 21:44:51,033 INFO L158 Benchmark]: Toolchain (without parser) took 741708.93ms. Allocated memory was 170.9MB in the beginning and 323.0MB in the end (delta: 152.0MB). Free memory was 135.2MB in the beginning and 140.2MB in the end (delta: -5.0MB). Peak memory consumption was 148.6MB. Max. memory is 8.0GB. [2022-03-15 21:44:51,033 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 170.9MB. Free memory is still 136.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:44:51,033 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.79ms. Allocated memory is still 170.9MB. Free memory was 135.1MB in the beginning and 133.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:44:51,033 INFO L158 Benchmark]: Boogie Preprocessor took 11.56ms. Allocated memory is still 170.9MB. Free memory was 133.5MB in the beginning and 132.7MB in the end (delta: 875.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:44:51,034 INFO L158 Benchmark]: RCFGBuilder took 204.69ms. Allocated memory is still 170.9MB. Free memory was 132.7MB in the beginning and 123.8MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 21:44:51,034 INFO L158 Benchmark]: TraceAbstraction took 741472.49ms. Allocated memory was 170.9MB in the beginning and 323.0MB in the end (delta: 152.0MB). Free memory was 123.4MB in the beginning and 140.2MB in the end (delta: -16.8MB). Peak memory consumption was 136.0MB. Max. memory is 8.0GB. [2022-03-15 21:44:51,034 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 170.9MB. Free memory is still 136.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 16.79ms. Allocated memory is still 170.9MB. Free memory was 135.1MB in the beginning and 133.5MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.56ms. Allocated memory is still 170.9MB. Free memory was 133.5MB in the beginning and 132.7MB in the end (delta: 875.7kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 204.69ms. Allocated memory is still 170.9MB. Free memory was 132.7MB in the beginning and 123.8MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 741472.49ms. Allocated memory was 170.9MB in the beginning and 323.0MB in the end (delta: 152.0MB). Free memory was 123.4MB in the beginning and 140.2MB in the end (delta: -16.8MB). Peak memory consumption was 136.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.3s, 28 PlacesBefore, 18 PlacesAfterwards, 23 TransitionsBefore, 13 TransitionsAfterwards, 48 CoEnabledTransitionPairs, 3 FixpointIterations, 7 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 11 TotalNumberOfCompositions, 48 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 48, positive: 48, positive conditional: 0, positive unconditional: 48, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 24, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 48, positive: 24, positive conditional: 0, positive unconditional: 24, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 24, unknown conditional: 0, unknown unconditional: 24] , Statistics on independence cache: Total cache size (in pairs): 5, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, 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: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1353states) and FLOYD_HOARE automaton (currently 81 states, 33 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 153 known predicates. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1353states) and FLOYD_HOARE automaton (currently 81 states, 33 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 153 known predicates. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1353states) and FLOYD_HOARE automaton (currently 81 states, 33 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 153 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 32 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 741.4s, OverallIterations: 202, TraceHistogramMax: 12, PathProgramHistogramMax: 200, EmptinessCheckTime: 0.1s, AutomataDifference: 309.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 36547 SdHoareTripleChecker+Valid, 48.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 36547 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 40.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 36653 mSDsCounter, 20736 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 109241 IncrementalHoareTripleChecker+Invalid, 129977 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20736 mSolverCounterUnsat, 0 mSDtfsCounter, 109241 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22603 GetRequests, 4393 SyntacticMatches, 313 SemanticMatches, 17896 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528398 ImplicationChecksByTransitivity, 455.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1372occurred in iteration=198, InterpolantAutomatonStates: 8312, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 201 MinimizatonAttempts, 138486 StatesRemovedByMinimization, 199 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 3.2s SatisfiabilityAnalysisTime, 298.1s InterpolantComputationTime, 9707 NumberOfCodeBlocks, 9707 NumberOfCodeBlocksAsserted, 991 NumberOfCheckSat, 13950 ConstructedInterpolants, 0 QuantifiedInterpolants, 204167 SizeOfPredicates, 679 NumberOfNonLiveVariables, 21425 ConjunctsInSsa, 7923 ConjunctsInUnsatCore, 602 InterpolantComputations, 2 PerfectInterpolantSequences, 11269/48760 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