/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/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:34:50,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:34:50,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:34:50,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 21:34:50,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 21:34:50,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 21:34:50,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 21:34:50,698 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 21:34:50,699 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 21:34:50,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 21:34:50,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 21:34:50,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-15 21:34:50,717 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 21:34:50,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 21:34:50,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 21:34:50,719 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 21:34:50,736 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:34:50,736 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:34:50,736 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:34:50,737 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:34:50,737 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:34:50,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:34:50,737 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:34:50,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:34:50,737 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:34:50,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:34:50,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:34:50,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:34:50,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:34:50,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:34:50,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:34:50,738 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:34:50,738 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:34:50,738 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:34:50,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:34:50,739 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:34:50,739 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:34:50,739 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:34:50,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:34:50,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:34:50,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:34:50,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:34:50,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:34:50,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:34:50,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:34:50,740 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:34:50,740 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:34:50,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:34:50,740 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:34:50,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:34:50,944 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:34:50,945 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:34:50,946 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:34:50,951 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:34:50,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2022-03-15 21:34:50,952 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2022-03-15 21:34:50,979 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:34:50,981 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:34:50,982 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:34:50,982 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:34:50,982 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:34:50,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/1) ... [2022-03-15 21:34:51,004 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/1) ... [2022-03-15 21:34:51,009 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:34:51,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:34:51,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:34:51,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:34:51,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:34:51,019 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/1) ... [2022-03-15 21:34:51,020 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/1) ... [2022-03-15 21:34:51,021 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/1) ... [2022-03-15 21:34:51,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/1) ... [2022-03-15 21:34:51,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/1) ... [2022-03-15 21:34:51,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/1) ... [2022-03-15 21:34:51,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/1) ... [2022-03-15 21:34:51,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:34:51,030 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:34:51,030 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:34:51,030 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:34:51,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/1) ... [2022-03-15 21:34:51,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:34:51,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:51,059 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 21:34:51,086 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 21:34:51,097 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:34:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:34:51,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:34:51,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:34:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:34:51,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:34:51,098 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:34:51,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:34:51,098 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:34:51,099 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 21:34:51,142 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:34:51,143 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:34:51,211 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:34:51,224 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:34:51,224 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 21:34:51,226 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:34:51 BoogieIcfgContainer [2022-03-15 21:34:51,226 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:34:51,228 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:34:51,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:34:51,231 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:34:51,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:34:50" (1/2) ... [2022-03-15 21:34:51,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f8b8f4 and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:34:51, skipping insertion in model container [2022-03-15 21:34:51,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:34:51" (2/2) ... [2022-03-15 21:34:51,234 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2022-03-15 21:34:51,238 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:34:51,238 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:34:51,238 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:34:51,238 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:34:51,271 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 21:34:51,301 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:34:51,318 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 21:34:51,318 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 21:34:51,330 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:34:51,341 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 31 places, 26 transitions, 68 flow [2022-03-15 21:34:51,345 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 31 places, 26 transitions, 68 flow [2022-03-15 21:34:51,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 68 flow [2022-03-15 21:34:51,391 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2022-03-15 21:34:51,392 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 21:34:51,397 INFO L84 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 2/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 18. Up to 2 conditions per place. [2022-03-15 21:34:51,400 INFO L116 LiptonReduction]: Number of co-enabled transitions 142 [2022-03-15 21:34:51,785 INFO L131 LiptonReduction]: Checked pairs total: 116 [2022-03-15 21:34:51,785 INFO L133 LiptonReduction]: Total number of compositions: 12 [2022-03-15 21:34:51,799 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2022-03-15 21:34:51,810 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 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 21:34:51,812 INFO L276 IsEmpty]: Start isEmpty. 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 21:34:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:34:51,815 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:51,816 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:51,816 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:51,821 INFO L85 PathProgramCache]: Analyzing trace with hash 588081927, now seen corresponding path program 1 times [2022-03-15 21:34:51,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:51,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558269195] [2022-03-15 21:34:51,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:51,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:51,931 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 21:34:51,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:51,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558269195] [2022-03-15 21:34:51,932 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558269195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:34:51,932 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:34:51,932 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:34:51,933 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [782968827] [2022-03-15 21:34:51,933 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:51,938 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:51,950 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2022-03-15 21:34:51,950 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:52,062 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:34:52,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:34:52,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:52,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:34:52,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:34:52,083 INFO L87 Difference]: Start difference. First 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) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:52,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:52,113 INFO L93 Difference]: Finished difference Result 23 states and 42 transitions. [2022-03-15 21:34:52,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:34:52,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 21:34:52,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:52,124 INFO L225 Difference]: With dead ends: 23 [2022-03-15 21:34:52,125 INFO L226 Difference]: Without dead ends: 23 [2022-03-15 21:34:52,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:34:52,129 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:52,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:34:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-15 21:34:52,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-15 21:34:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.9090909090909092) 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 21:34:52,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 42 transitions. [2022-03-15 21:34:52,168 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 42 transitions. Word has length 10 [2022-03-15 21:34:52,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:52,168 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 42 transitions. [2022-03-15 21:34:52,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:52,169 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 42 transitions. [2022-03-15 21:34:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:34:52,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:52,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:52,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:34:52,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:52,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:52,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1050795477, now seen corresponding path program 1 times [2022-03-15 21:34:52,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:52,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400529257] [2022-03-15 21:34:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:52,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:52,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:52,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:52,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400529257] [2022-03-15 21:34:52,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400529257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:52,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050877849] [2022-03-15 21:34:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:52,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:52,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:52,320 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 21:34:52,339 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 21:34:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:52,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:34:52,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:52,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:52,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:52,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:52,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050877849] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:52,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:52,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-03-15 21:34:52,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1710542224] [2022-03-15 21:34:52,634 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:52,635 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:52,637 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 25 transitions. [2022-03-15 21:34:52,637 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:52,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-03-15 21:34:52,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 21:34:52,886 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [214#(and (or (<= N 0) (< i N)) (or (= s 0) (< i N)) (or (<= 0 N) (< i N))), 207#(or (and (<= 0 N) (<= N 0)) (< i N)), 215#(and (<= 0 N) (or (= s 0) (< 0 N)))] [2022-03-15 21:34:52,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:34:52,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:52,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:34:52,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:34:52,887 INFO L87 Difference]: Start difference. First operand 23 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 21:34:53,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:53,073 INFO L93 Difference]: Finished difference Result 44 states and 79 transitions. [2022-03-15 21:34:53,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:34:53,075 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 11 [2022-03-15 21:34:53,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:53,075 INFO L225 Difference]: With dead ends: 44 [2022-03-15 21:34:53,075 INFO L226 Difference]: Without dead ends: 41 [2022-03-15 21:34:53,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:34:53,076 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 43 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:53,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 9 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:53,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-15 21:34:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2022-03-15 21:34:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9333333333333333) 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 21:34:53,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 58 transitions. [2022-03-15 21:34:53,080 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 58 transitions. Word has length 11 [2022-03-15 21:34:53,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:53,081 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 58 transitions. [2022-03-15 21:34:53,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 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 21:34:53,081 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 58 transitions. [2022-03-15 21:34:53,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 21:34:53,081 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:53,081 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:53,101 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 21:34:53,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:53,282 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:53,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:53,283 INFO L85 PathProgramCache]: Analyzing trace with hash 364903345, now seen corresponding path program 2 times [2022-03-15 21:34:53,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:53,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099905029] [2022-03-15 21:34:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:53,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:53,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:53,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:53,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099905029] [2022-03-15 21:34:53,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099905029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:34:53,304 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:34:53,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 21:34:53,304 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1201002962] [2022-03-15 21:34:53,304 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:53,305 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:53,306 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2022-03-15 21:34:53,306 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:53,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:34:53,332 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:34:53,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:34:53,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:53,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:34:53,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:34:53,333 INFO L87 Difference]: Start difference. First operand 31 states and 58 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:53,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:53,346 INFO L93 Difference]: Finished difference Result 29 states and 52 transitions. [2022-03-15 21:34:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:34:53,346 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 21:34:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:53,347 INFO L225 Difference]: With dead ends: 29 [2022-03-15 21:34:53,347 INFO L226 Difference]: Without dead ends: 29 [2022-03-15 21:34:53,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 2 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 21:34:53,347 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:53,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:34:53,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-15 21:34:53,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-15 21:34:53,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.8571428571428572) 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 21:34:53,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 52 transitions. [2022-03-15 21:34:53,350 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 52 transitions. Word has length 11 [2022-03-15 21:34:53,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:53,351 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 52 transitions. [2022-03-15 21:34:53,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:53,351 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 52 transitions. [2022-03-15 21:34:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:34:53,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:53,351 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:53,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-15 21:34:53,352 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:53,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:53,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1784953657, now seen corresponding path program 3 times [2022-03-15 21:34:53,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:53,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201431929] [2022-03-15 21:34:53,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:53,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:53,397 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:53,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:53,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201431929] [2022-03-15 21:34:53,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201431929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:53,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156616133] [2022-03-15 21:34:53,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:34:53,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:53,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:53,404 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 21:34:53,405 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 21:34:53,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 21:34:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:53,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 21:34:53,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:53,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 21:34:53,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156616133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:34:53,467 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 21:34:53,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-03-15 21:34:53,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1823636029] [2022-03-15 21:34:53,467 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:53,469 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:53,479 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 28 transitions. [2022-03-15 21:34:53,479 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:53,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-03-15 21:34:53,546 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:34:53,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 21:34:53,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:53,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 21:34:53,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:34:53,549 INFO L87 Difference]: Start difference. First operand 29 states and 52 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:53,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:53,575 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2022-03-15 21:34:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 21:34:53,575 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:34:53,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:53,576 INFO L225 Difference]: With dead ends: 50 [2022-03-15 21:34:53,576 INFO L226 Difference]: Without dead ends: 43 [2022-03-15 21:34:53,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:34:53,582 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:53,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 2 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:34:53,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-15 21:34:53,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-03-15 21:34:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:53,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 66 transitions. [2022-03-15 21:34:53,594 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 66 transitions. Word has length 12 [2022-03-15 21:34:53,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:53,594 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 66 transitions. [2022-03-15 21:34:53,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 66 transitions. [2022-03-15 21:34:53,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:34:53,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:53,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:53,614 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 21:34:53,803 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 21:34:53,804 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:53,804 INFO L85 PathProgramCache]: Analyzing trace with hash -685269588, now seen corresponding path program 1 times [2022-03-15 21:34:53,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:53,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681600279] [2022-03-15 21:34:53,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:53,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:53,832 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 21:34:53,832 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:53,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681600279] [2022-03-15 21:34:53,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681600279] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:53,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018648802] [2022-03-15 21:34:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:53,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:53,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:53,834 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 21:34:53,835 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 21:34:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:53,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:34:53,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:53,903 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 21:34:53,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:53,929 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 21:34:53,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 21:34:53,937 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 21:34:53,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018648802] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:53,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:53,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 7 [2022-03-15 21:34:53,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [132578182] [2022-03-15 21:34:53,938 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:53,939 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:53,941 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2022-03-15 21:34:53,941 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:53,974 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:34:53,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:34:53,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:53,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:34:53,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:34:53,975 INFO L87 Difference]: Start difference. First operand 33 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:54,011 INFO L93 Difference]: Finished difference Result 40 states and 80 transitions. [2022-03-15 21:34:54,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:34:54,012 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:34:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:54,014 INFO L225 Difference]: With dead ends: 40 [2022-03-15 21:34:54,014 INFO L226 Difference]: Without dead ends: 40 [2022-03-15 21:34:54,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-03-15 21:34:54,015 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:54,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:34:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-15 21:34:54,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-15 21:34:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.051282051282051) internal successors, (80), 39 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 80 transitions. [2022-03-15 21:34:54,025 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 80 transitions. Word has length 12 [2022-03-15 21:34:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:54,026 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 80 transitions. [2022-03-15 21:34:54,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:54,026 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 80 transitions. [2022-03-15 21:34:54,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:34:54,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:54,027 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:54,046 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 21:34:54,239 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 21:34:54,239 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:54,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:54,240 INFO L85 PathProgramCache]: Analyzing trace with hash 231604176, now seen corresponding path program 2 times [2022-03-15 21:34:54,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:54,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646990322] [2022-03-15 21:34:54,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:54,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:54,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:54,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646990322] [2022-03-15 21:34:54,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646990322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:54,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756405937] [2022-03-15 21:34:54,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:34:54,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:54,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:54,338 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 21:34:54,339 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 21:34:54,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:34:54,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:54,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:34:54,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:54,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-15 21:34:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:54,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:54,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:34:54,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-03-15 21:34:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:54,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756405937] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:54,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:54,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 21:34:54,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [699754242] [2022-03-15 21:34:54,658 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:54,659 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:54,661 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 33 transitions. [2022-03-15 21:34:54,661 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:54,816 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [865#(and (= (select q q_front) 1) (<= N 1) (<= 1 N)), 866#(and (= (select q q_front) 1) (<= i 1) (<= 1 N)), 864#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:34:54,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:34:54,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:54,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:34:54,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:34:54,817 INFO L87 Difference]: Start difference. First operand 40 states and 80 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 21:34:54,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:54,996 INFO L93 Difference]: Finished difference Result 55 states and 103 transitions. [2022-03-15 21:34:54,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:34:54,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 13 [2022-03-15 21:34:54,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:54,997 INFO L225 Difference]: With dead ends: 55 [2022-03-15 21:34:54,997 INFO L226 Difference]: Without dead ends: 52 [2022-03-15 21:34:54,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:34:54,998 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:54,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 10 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:54,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-15 21:34:55,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 45. [2022-03-15 21:34:55,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2022-03-15 21:34:55,003 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 13 [2022-03-15 21:34:55,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:55,003 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2022-03-15 21:34:55,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 21:34:55,003 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2022-03-15 21:34:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 21:34:55,004 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:55,004 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:55,028 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 21:34:55,219 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 21:34:55,219 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:55,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:55,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1181382954, now seen corresponding path program 3 times [2022-03-15 21:34:55,222 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:55,222 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188014986] [2022-03-15 21:34:55,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:55,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:55,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:55,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188014986] [2022-03-15 21:34:55,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188014986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:55,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209048470] [2022-03-15 21:34:55,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:34:55,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:55,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:55,319 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 21:34:55,322 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 21:34:55,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 21:34:55,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:55,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 21:34:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:55,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-15 21:34:55,475 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:55,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:55,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:34:55,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-03-15 21:34:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:55,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209048470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:55,596 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:55,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-15 21:34:55,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1847781925] [2022-03-15 21:34:55,596 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:55,597 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:55,598 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2022-03-15 21:34:55,598 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:55,692 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1110#(and (= (select q q_front) 1) (<= i 1) (<= 1 N)), 1111#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:34:55,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:34:55,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:34:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:34:55,694 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 11 states, 10 states have (on average 2.0) 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 21:34:55,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:55,846 INFO L93 Difference]: Finished difference Result 55 states and 101 transitions. [2022-03-15 21:34:55,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:34:55,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) 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 13 [2022-03-15 21:34:55,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:55,847 INFO L225 Difference]: With dead ends: 55 [2022-03-15 21:34:55,847 INFO L226 Difference]: Without dead ends: 48 [2022-03-15 21:34:55,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:34:55,848 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:55,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:55,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-15 21:34:55,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-03-15 21:34:55,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2022-03-15 21:34:55,850 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 13 [2022-03-15 21:34:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:55,850 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2022-03-15 21:34:55,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) 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 21:34:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2022-03-15 21:34:55,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:34:55,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:55,851 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:55,870 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 21:34:56,055 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 21:34:56,056 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:56,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:56,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1410080212, now seen corresponding path program 4 times [2022-03-15 21:34:56,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:56,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530980708] [2022-03-15 21:34:56,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:56,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:56,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:56,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:56,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530980708] [2022-03-15 21:34:56,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530980708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:56,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847711675] [2022-03-15 21:34:56,086 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:34:56,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:56,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:56,095 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 21:34:56,096 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 21:34:56,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:34:56,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:56,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 21:34:56,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:56,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:56,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847711675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:56,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:56,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 21:34:56,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [146028381] [2022-03-15 21:34:56,179 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:56,180 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:56,182 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 36 transitions. [2022-03-15 21:34:56,182 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:56,230 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:34:56,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:34:56,230 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:56,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:34:56,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:34:56,231 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21:34:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:56,255 INFO L93 Difference]: Finished difference Result 78 states and 144 transitions. [2022-03-15 21:34:56,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:34:56,255 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 14 [2022-03-15 21:34:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:56,256 INFO L225 Difference]: With dead ends: 78 [2022-03-15 21:34:56,256 INFO L226 Difference]: Without dead ends: 69 [2022-03-15 21:34:56,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:34:56,257 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:56,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 2 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:34:56,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-15 21:34:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 47. [2022-03-15 21:34:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.108695652173913) internal successors, (97), 46 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:56,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 97 transitions. [2022-03-15 21:34:56,264 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 97 transitions. Word has length 14 [2022-03-15 21:34:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:56,264 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 97 transitions. [2022-03-15 21:34:56,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21:34:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 97 transitions. [2022-03-15 21:34:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:34:56,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:56,266 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:56,291 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 21:34:56,477 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 21:34:56,477 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:56,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:56,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1506475565, now seen corresponding path program 5 times [2022-03-15 21:34:56,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:56,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403299507] [2022-03-15 21:34:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:56,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:56,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:56,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:56,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403299507] [2022-03-15 21:34:56,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403299507] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:56,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991079988] [2022-03-15 21:34:56,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:34:56,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:56,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:56,554 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 21:34:56,555 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 21:34:56,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:34:56,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:56,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:34:56,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:56,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:56,638 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 21:34:56,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 21:34:56,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:56,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991079988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:56,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:56,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-03-15 21:34:56,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1990062010] [2022-03-15 21:34:56,653 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:56,653 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:56,655 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 21:34:56,655 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:56,683 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:34:56,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:34:56,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:56,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:34:56,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:34:56,684 INFO L87 Difference]: Start difference. First operand 47 states and 97 transitions. Second operand has 6 states, 6 states have (on average 3.0) 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 21:34:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:56,739 INFO L93 Difference]: Finished difference Result 71 states and 147 transitions. [2022-03-15 21:34:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:34:56,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) 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 14 [2022-03-15 21:34:56,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:56,740 INFO L225 Difference]: With dead ends: 71 [2022-03-15 21:34:56,740 INFO L226 Difference]: Without dead ends: 71 [2022-03-15 21:34:56,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:34:56,741 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 10 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:56,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:34:56,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-15 21:34:56,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2022-03-15 21:34:56,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.076923076923077) internal successors, (108), 52 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:56,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 108 transitions. [2022-03-15 21:34:56,743 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 108 transitions. Word has length 14 [2022-03-15 21:34:56,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:56,743 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 108 transitions. [2022-03-15 21:34:56,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) 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 21:34:56,743 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 108 transitions. [2022-03-15 21:34:56,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:34:56,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:56,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:56,777 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 21:34:56,952 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 21:34:56,953 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:56,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:56,953 INFO L85 PathProgramCache]: Analyzing trace with hash -520197947, now seen corresponding path program 6 times [2022-03-15 21:34:56,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:56,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259178360] [2022-03-15 21:34:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:56,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:56,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:57,001 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 21:34:57,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:57,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259178360] [2022-03-15 21:34:57,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259178360] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:57,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742359737] [2022-03-15 21:34:57,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:34:57,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:57,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:57,011 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 21:34:57,012 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 21:34:57,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-15 21:34:57,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:57,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:34:57,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:57,081 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 21:34:57,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:57,110 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:34:57,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:34:57,123 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 21:34:57,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742359737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:57,124 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:57,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-03-15 21:34:57,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1067618698] [2022-03-15 21:34:57,124 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:57,125 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:57,127 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2022-03-15 21:34:57,127 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:57,202 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:34:57,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:34:57,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:57,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:34:57,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:34:57,203 INFO L87 Difference]: Start difference. First operand 53 states and 108 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 21:34:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:57,302 INFO L93 Difference]: Finished difference Result 74 states and 152 transitions. [2022-03-15 21:34:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:34:57,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 14 [2022-03-15 21:34:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:57,303 INFO L225 Difference]: With dead ends: 74 [2022-03-15 21:34:57,304 INFO L226 Difference]: Without dead ends: 74 [2022-03-15 21:34:57,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:34:57,304 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:57,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:57,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-15 21:34:57,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 59. [2022-03-15 21:34:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.103448275862069) internal successors, (122), 58 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 122 transitions. [2022-03-15 21:34:57,309 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 122 transitions. Word has length 14 [2022-03-15 21:34:57,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:57,309 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 122 transitions. [2022-03-15 21:34:57,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 21:34:57,310 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 122 transitions. [2022-03-15 21:34:57,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:34:57,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:57,311 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:57,333 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 21:34:57,527 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 21:34:57,528 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:57,528 INFO L85 PathProgramCache]: Analyzing trace with hash -543772817, now seen corresponding path program 7 times [2022-03-15 21:34:57,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:57,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720782876] [2022-03-15 21:34:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:57,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:57,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:57,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:57,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720782876] [2022-03-15 21:34:57,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720782876] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:57,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559004852] [2022-03-15 21:34:57,671 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:34:57,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:57,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:57,672 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 21:34:57,678 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 21:34:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:57,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 21:34:57,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:57,844 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-15 21:34:57,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 21:34:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:57,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:58,061 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:34:58,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-03-15 21:34:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:58,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559004852] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:58,150 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:58,150 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 18 [2022-03-15 21:34:58,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [274517106] [2022-03-15 21:34:58,150 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:58,151 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:58,153 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 29 transitions. [2022-03-15 21:34:58,153 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:58,304 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2187#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 2188#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:34:58,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:34:58,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:58,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:34:58,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:34:58,305 INFO L87 Difference]: Start difference. First operand 59 states and 122 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) 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 21:34:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:58,536 INFO L93 Difference]: Finished difference Result 71 states and 138 transitions. [2022-03-15 21:34:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:34:58,536 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) 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 15 [2022-03-15 21:34:58,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:58,537 INFO L225 Difference]: With dead ends: 71 [2022-03-15 21:34:58,537 INFO L226 Difference]: Without dead ends: 62 [2022-03-15 21:34:58,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:34:58,538 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:58,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 9 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:58,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-15 21:34:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 59. [2022-03-15 21:34:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.086206896551724) internal successors, (121), 58 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 121 transitions. [2022-03-15 21:34:58,540 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 121 transitions. Word has length 15 [2022-03-15 21:34:58,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:58,540 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 121 transitions. [2022-03-15 21:34:58,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) 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 21:34:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 121 transitions. [2022-03-15 21:34:58,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:34:58,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:58,541 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:58,573 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 21:34:58,747 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 21:34:58,747 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:58,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:58,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1956759947, now seen corresponding path program 8 times [2022-03-15 21:34:58,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:58,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600433439] [2022-03-15 21:34:58,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:58,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:34:58,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:34:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:34:58,875 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:34:58,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600433439] [2022-03-15 21:34:58,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600433439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:34:58,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240853553] [2022-03-15 21:34:58,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:34:58,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:34:58,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:34:58,876 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 21:34:58,891 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 21:34:58,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:34:58,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:34:58,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 21:34:58,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:34:59,017 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-15 21:34:59,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 21:34:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:59,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:34:59,250 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:34:59,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-03-15 21:34:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:34:59,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240853553] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:34:59,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:34:59,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-15 21:34:59,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [193541268] [2022-03-15 21:34:59,343 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:34:59,344 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:34:59,346 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2022-03-15 21:34:59,346 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:34:59,483 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [2498#(and (<= 0 s) (= q_back q_front) (<= s 0)), 2497#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:34:59,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:34:59,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:34:59,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:34:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:34:59,484 INFO L87 Difference]: Start difference. First operand 59 states and 121 transitions. Second operand has 12 states, 11 states have (on average 2.0) 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 21:34:59,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:34:59,777 INFO L93 Difference]: Finished difference Result 68 states and 132 transitions. [2022-03-15 21:34:59,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:34:59,777 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.0) 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 15 [2022-03-15 21:34:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:34:59,778 INFO L225 Difference]: With dead ends: 68 [2022-03-15 21:34:59,778 INFO L226 Difference]: Without dead ends: 61 [2022-03-15 21:34:59,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=906, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:34:59,778 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:34:59,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 7 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:34:59,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-15 21:34:59,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2022-03-15 21:34:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.109090909090909) internal successors, (116), 55 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:34:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 116 transitions. [2022-03-15 21:34:59,783 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 116 transitions. Word has length 15 [2022-03-15 21:34:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:34:59,784 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 116 transitions. [2022-03-15 21:34:59,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.0) 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 21:34:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 116 transitions. [2022-03-15 21:34:59,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:34:59,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:34:59,785 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:34:59,805 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 21:34:59,995 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 21:34:59,996 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:34:59,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:34:59,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1053857751, now seen corresponding path program 9 times [2022-03-15 21:34:59,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:34:59,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481280258] [2022-03-15 21:34:59,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:34:59,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:00,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:00,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481280258] [2022-03-15 21:35:00,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481280258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:00,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23200497] [2022-03-15 21:35:00,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:35:00,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:00,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:00,117 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 21:35:00,118 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 21:35:00,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:35:00,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:00,142 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 21:35:00,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:00,285 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 21:35:00,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2022-03-15 21:35:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:00,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:00,550 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:35:00,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-03-15 21:35:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:00,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23200497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:00,629 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:00,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 21:35:00,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1213269285] [2022-03-15 21:35:00,629 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:00,630 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:00,634 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 41 transitions. [2022-03-15 21:35:00,634 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:00,986 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [2805#(and (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= 2 N) (<= N 2)), 2807#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 2806#(and (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= 2 N) (<= i 2)), 2808#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:35:00,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:35:00,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:00,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:35:00,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:35:00,987 INFO L87 Difference]: Start difference. First operand 56 states and 116 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 21:35:01,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:01,396 INFO L93 Difference]: Finished difference Result 78 states and 151 transitions. [2022-03-15 21:35:01,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:35:01,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 15 [2022-03-15 21:35:01,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:01,397 INFO L225 Difference]: With dead ends: 78 [2022-03-15 21:35:01,397 INFO L226 Difference]: Without dead ends: 75 [2022-03-15 21:35:01,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:35:01,398 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 19 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:01,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 13 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:01,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-15 21:35:01,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2022-03-15 21:35:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:01,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2022-03-15 21:35:01,400 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2022-03-15 21:35:01,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:01,400 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2022-03-15 21:35:01,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 21:35:01,400 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2022-03-15 21:35:01,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:35:01,400 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:01,401 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:01,418 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 21:35:01,609 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 21:35:01,609 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:01,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:01,610 INFO L85 PathProgramCache]: Analyzing trace with hash 200929681, now seen corresponding path program 10 times [2022-03-15 21:35:01,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:01,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902263918] [2022-03-15 21:35:01,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:01,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:01,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:01,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902263918] [2022-03-15 21:35:01,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902263918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:01,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699735372] [2022-03-15 21:35:01,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:35:01,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:01,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:01,734 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 21:35:01,737 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 21:35:01,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:35:01,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:01,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 21:35:01,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:01,921 INFO L353 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-03-15 21:35:01,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2022-03-15 21:35:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:01,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:02,143 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:35:02,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 62 [2022-03-15 21:35:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:02,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699735372] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:02,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:02,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 21:35:02,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2115925717] [2022-03-15 21:35:02,211 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:02,211 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:02,213 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 33 transitions. [2022-03-15 21:35:02,213 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:02,409 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3138#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 3139#(and (<= 0 s) (= q_back q_front) (<= s 0)), 3137#(and (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= 2 N) (<= i 2))] [2022-03-15 21:35:02,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:35:02,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:02,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:35:02,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:35:02,409 INFO L87 Difference]: Start difference. First operand 61 states and 123 transitions. Second operand has 14 states, 13 states have (on average 2.0) 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 21:35:02,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:02,793 INFO L93 Difference]: Finished difference Result 86 states and 166 transitions. [2022-03-15 21:35:02,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:35:02,793 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) 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 15 [2022-03-15 21:35:02,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:02,794 INFO L225 Difference]: With dead ends: 86 [2022-03-15 21:35:02,794 INFO L226 Difference]: Without dead ends: 77 [2022-03-15 21:35:02,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:35:02,795 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:02,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 9 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:02,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-15 21:35:02,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 59. [2022-03-15 21:35:02,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2022-03-15 21:35:02,797 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2022-03-15 21:35:02,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:02,797 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2022-03-15 21:35:02,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) 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 21:35:02,797 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2022-03-15 21:35:02,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 21:35:02,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:02,798 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:02,814 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 21:35:03,007 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 21:35:03,008 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:03,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1212057449, now seen corresponding path program 11 times [2022-03-15 21:35:03,009 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:03,009 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188484251] [2022-03-15 21:35:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:03,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:03,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:03,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188484251] [2022-03-15 21:35:03,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188484251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:03,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423683608] [2022-03-15 21:35:03,131 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:35:03,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:03,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:03,132 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 21:35:03,133 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 21:35:03,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:35:03,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:03,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 21:35:03,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:03,292 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 21:35:03,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2022-03-15 21:35:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:03,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:03,532 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:35:03,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2022-03-15 21:35:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:03,601 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423683608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:03,601 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:03,601 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 21:35:03,601 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [105948379] [2022-03-15 21:35:03,601 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:03,602 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:03,603 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2022-03-15 21:35:03,603 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:03,770 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [3471#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 3470#(and (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= 2 N) (<= i 2)), 3472#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:35:03,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:35:03,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:03,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:35:03,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:35:03,771 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) 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 21:35:04,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:04,156 INFO L93 Difference]: Finished difference Result 85 states and 163 transitions. [2022-03-15 21:35:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:35:04,157 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) 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 15 [2022-03-15 21:35:04,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:04,157 INFO L225 Difference]: With dead ends: 85 [2022-03-15 21:35:04,157 INFO L226 Difference]: Without dead ends: 78 [2022-03-15 21:35:04,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:35:04,158 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:04,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 6 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-15 21:35:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2022-03-15 21:35:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2022-03-15 21:35:04,160 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 15 [2022-03-15 21:35:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:04,160 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2022-03-15 21:35:04,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) 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 21:35:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2022-03-15 21:35:04,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:35:04,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:04,161 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:04,177 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 21:35:04,370 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 21:35:04,370 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:04,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:04,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1690023163, now seen corresponding path program 12 times [2022-03-15 21:35:04,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:04,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008500459] [2022-03-15 21:35:04,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:04,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:04,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:04,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008500459] [2022-03-15 21:35:04,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008500459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:04,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392151258] [2022-03-15 21:35:04,411 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:04,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:04,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:04,413 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 21:35:04,414 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 21:35:04,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:35:04,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:04,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:35:04,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:04,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:04,489 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:04,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392151258] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:04,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:04,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-15 21:35:04,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [365781053] [2022-03-15 21:35:04,490 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:04,490 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:04,492 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 44 transitions. [2022-03-15 21:35:04,492 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:04,558 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:35:04,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:35:04,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:04,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:35:04,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:35:04,559 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 21:35:04,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:04,602 INFO L93 Difference]: Finished difference Result 109 states and 208 transitions. [2022-03-15 21:35:04,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:35:04,602 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 21:35:04,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:04,603 INFO L225 Difference]: With dead ends: 109 [2022-03-15 21:35:04,603 INFO L226 Difference]: Without dead ends: 98 [2022-03-15 21:35:04,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:35:04,603 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:04,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 2 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:35:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-15 21:35:04,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2022-03-15 21:35:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.142857142857143) internal successors, (135), 63 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 21:35:04,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 135 transitions. [2022-03-15 21:35:04,605 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 135 transitions. Word has length 16 [2022-03-15 21:35:04,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:04,606 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 135 transitions. [2022-03-15 21:35:04,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 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 21:35:04,606 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 135 transitions. [2022-03-15 21:35:04,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:35:04,606 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:04,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:04,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-15 21:35:04,806 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 21:35:04,807 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:04,807 INFO L85 PathProgramCache]: Analyzing trace with hash 555566220, now seen corresponding path program 13 times [2022-03-15 21:35:04,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:04,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401172570] [2022-03-15 21:35:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:04,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:04,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:04,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401172570] [2022-03-15 21:35:04,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401172570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:04,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877701935] [2022-03-15 21:35:04,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:35:04,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:04,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:04,849 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 21:35:04,850 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 21:35:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:04,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:35:04,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:04,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:04,930 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 21:35:04,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 21:35:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:04,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877701935] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:04,953 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:04,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-03-15 21:35:04,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1769390765] [2022-03-15 21:35:04,953 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:04,954 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:04,955 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 32 transitions. [2022-03-15 21:35:04,955 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:05,000 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:35:05,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:35:05,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:05,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:35:05,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:35:05,001 INFO L87 Difference]: Start difference. First operand 64 states and 135 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:05,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:05,136 INFO L93 Difference]: Finished difference Result 150 states and 303 transitions. [2022-03-15 21:35:05,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:35:05,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:35:05,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:05,138 INFO L225 Difference]: With dead ends: 150 [2022-03-15 21:35:05,138 INFO L226 Difference]: Without dead ends: 150 [2022-03-15 21:35:05,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 9 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:35:05,139 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 36 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:05,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 11 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-03-15 21:35:05,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 86. [2022-03-15 21:35:05,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.3176470588235296) internal successors, (197), 85 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 197 transitions. [2022-03-15 21:35:05,144 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 197 transitions. Word has length 16 [2022-03-15 21:35:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:05,144 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 197 transitions. [2022-03-15 21:35:05,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:05,144 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 197 transitions. [2022-03-15 21:35:05,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:35:05,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:05,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:05,170 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 21:35:05,361 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 21:35:05,361 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:05,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1471107292, now seen corresponding path program 14 times [2022-03-15 21:35:05,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:05,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035913595] [2022-03-15 21:35:05,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:05,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:05,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:05,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035913595] [2022-03-15 21:35:05,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035913595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:05,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145136836] [2022-03-15 21:35:05,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:35:05,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:05,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:05,424 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 21:35:05,425 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 21:35:05,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:35:05,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:05,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:35:05,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:05,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:05,546 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:35:05,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:35:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:05,568 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145136836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:05,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:05,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-03-15 21:35:05,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2077679951] [2022-03-15 21:35:05,569 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:05,570 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:05,571 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 34 transitions. [2022-03-15 21:35:05,571 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:05,619 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:35:05,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:35:05,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:05,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:35:05,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-15 21:35:05,620 INFO L87 Difference]: Start difference. First operand 86 states and 197 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:05,779 INFO L93 Difference]: Finished difference Result 146 states and 295 transitions. [2022-03-15 21:35:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:35:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:35:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:05,780 INFO L225 Difference]: With dead ends: 146 [2022-03-15 21:35:05,780 INFO L226 Difference]: Without dead ends: 146 [2022-03-15 21:35:05,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:35:05,781 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:05,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 13 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:05,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-15 21:35:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 73. [2022-03-15 21:35:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.111111111111111) internal successors, (152), 72 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:05,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 152 transitions. [2022-03-15 21:35:05,783 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 152 transitions. Word has length 16 [2022-03-15 21:35:05,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:05,783 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 152 transitions. [2022-03-15 21:35:05,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:05,783 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 152 transitions. [2022-03-15 21:35:05,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:35:05,784 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:05,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:05,800 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 21:35:05,987 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 21:35:05,988 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:05,988 INFO L85 PathProgramCache]: Analyzing trace with hash 126523276, now seen corresponding path program 15 times [2022-03-15 21:35:05,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:05,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482994233] [2022-03-15 21:35:05,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:05,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:06,046 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 21:35:06,047 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:06,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482994233] [2022-03-15 21:35:06,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482994233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:06,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656793596] [2022-03-15 21:35:06,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:35:06,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:06,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:06,048 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 21:35:06,049 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 21:35:06,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:35:06,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:06,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:35:06,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:06,154 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 21:35:06,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:06,186 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:35:06,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:35:06,202 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 21:35:06,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656793596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:06,202 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:06,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 16 [2022-03-15 21:35:06,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [498287732] [2022-03-15 21:35:06,202 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:06,203 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:06,205 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 46 transitions. [2022-03-15 21:35:06,205 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:06,317 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:35:06,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:35:06,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:06,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:35:06,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:35:06,318 INFO L87 Difference]: Start difference. First operand 73 states and 152 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:06,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:06,517 INFO L93 Difference]: Finished difference Result 155 states and 324 transitions. [2022-03-15 21:35:06,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:35:06,518 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:35:06,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:06,518 INFO L225 Difference]: With dead ends: 155 [2022-03-15 21:35:06,518 INFO L226 Difference]: Without dead ends: 155 [2022-03-15 21:35:06,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:35:06,519 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:06,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 11 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:06,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-15 21:35:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 80. [2022-03-15 21:35:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2022-03-15 21:35:06,522 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2022-03-15 21:35:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:06,522 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2022-03-15 21:35:06,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:06,522 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2022-03-15 21:35:06,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:35:06,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:06,523 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:06,539 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 21:35:06,727 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 21:35:06,727 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:06,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:06,728 INFO L85 PathProgramCache]: Analyzing trace with hash 42808560, now seen corresponding path program 16 times [2022-03-15 21:35:06,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:06,729 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561807204] [2022-03-15 21:35:06,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:06,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:06,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:06,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:06,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561807204] [2022-03-15 21:35:06,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561807204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:06,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026908954] [2022-03-15 21:35:06,882 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:35:06,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:06,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:06,892 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 21:35:06,893 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 21:35:06,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:35:06,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:06,917 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:35:06,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:07,144 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-15 21:35:07,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 16 [2022-03-15 21:35:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:07,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:07,460 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:35:07,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 116 [2022-03-15 21:35:07,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:07,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026908954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:07,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:07,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-15 21:35:07,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2090094075] [2022-03-15 21:35:07,640 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:07,640 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:07,642 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 35 transitions. [2022-03-15 21:35:07,642 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:07,856 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [5446#(and (<= 0 s) (= q_back q_front) (<= s 0)), 5444#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 5445#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:07,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:35:07,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:07,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:35:07,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:35:07,857 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 21:35:08,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:08,211 INFO L93 Difference]: Finished difference Result 104 states and 208 transitions. [2022-03-15 21:35:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:35:08,212 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 17 [2022-03-15 21:35:08,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:08,212 INFO L225 Difference]: With dead ends: 104 [2022-03-15 21:35:08,212 INFO L226 Difference]: Without dead ends: 95 [2022-03-15 21:35:08,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:35:08,213 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:08,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:08,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-15 21:35:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2022-03-15 21:35:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1375) internal successors, (171), 80 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:08,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 171 transitions. [2022-03-15 21:35:08,215 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 171 transitions. Word has length 17 [2022-03-15 21:35:08,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:08,215 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 171 transitions. [2022-03-15 21:35:08,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 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 21:35:08,215 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 171 transitions. [2022-03-15 21:35:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:35:08,216 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:08,216 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:08,232 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-15 21:35:08,431 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 21:35:08,431 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:08,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:08,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1370178570, now seen corresponding path program 17 times [2022-03-15 21:35:08,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:08,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994932764] [2022-03-15 21:35:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:08,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:08,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:08,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:08,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994932764] [2022-03-15 21:35:08,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994932764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:08,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149276330] [2022-03-15 21:35:08,566 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:35:08,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:08,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:08,567 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 21:35:08,568 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 21:35:08,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:35:08,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:08,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-15 21:35:08,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:08,777 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-15 21:35:08,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 16 [2022-03-15 21:35:08,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:08,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:09,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:09,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:09,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:09,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:09,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:09,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:09,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:09,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:09,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:09,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:35:09,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 99 [2022-03-15 21:35:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:09,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149276330] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:09,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:09,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12, 12] total 29 [2022-03-15 21:35:09,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1306575002] [2022-03-15 21:35:09,265 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:09,266 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:09,268 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2022-03-15 21:35:09,268 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:09,434 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [5860#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 5861#(and (<= 0 s) (= q_back q_front) (<= s 0)), 5862#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:09,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:35:09,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:09,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:35:09,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=967, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:35:09,435 INFO L87 Difference]: Start difference. First operand 81 states and 171 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 21:35:09,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:09,777 INFO L93 Difference]: Finished difference Result 104 states and 207 transitions. [2022-03-15 21:35:09,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:35:09,778 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 17 [2022-03-15 21:35:09,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:09,778 INFO L225 Difference]: With dead ends: 104 [2022-03-15 21:35:09,778 INFO L226 Difference]: Without dead ends: 97 [2022-03-15 21:35:09,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=267, Invalid=1713, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:35:09,779 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:09,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 7 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:09,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-15 21:35:09,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2022-03-15 21:35:09,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:09,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2022-03-15 21:35:09,781 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 17 [2022-03-15 21:35:09,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:09,781 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2022-03-15 21:35:09,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 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 21:35:09,781 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2022-03-15 21:35:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:35:09,782 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:09,782 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:09,801 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 21:35:10,000 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 21:35:10,000 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:10,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:10,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1640439128, now seen corresponding path program 18 times [2022-03-15 21:35:10,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:10,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114029369] [2022-03-15 21:35:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:10,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:10,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:10,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:10,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114029369] [2022-03-15 21:35:10,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114029369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:10,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180408961] [2022-03-15 21:35:10,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:10,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:10,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:10,153 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 21:35:10,154 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 21:35:10,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:35:10,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:10,178 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 54 conjunts are in the unsatisfiable core [2022-03-15 21:35:10,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:10,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:10,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:10,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:10,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:10,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:10,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:10,551 INFO L353 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-03-15 21:35:10,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 53 [2022-03-15 21:35:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:10,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:11,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:11,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:11,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:11,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:11,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:11,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:11,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:11,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:11,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:11,504 INFO L353 Elim1Store]: treesize reduction 46, result has 60.7 percent of original size [2022-03-15 21:35:11,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 81 treesize of output 115 [2022-03-15 21:35:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:11,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180408961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:11,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:11,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 30 [2022-03-15 21:35:11,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1972407418] [2022-03-15 21:35:11,730 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:11,731 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:11,733 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 37 transitions. [2022-03-15 21:35:11,733 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:11,970 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [6278#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 6279#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 6277#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:35:11,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:35:11,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:11,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:35:11,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1007, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:35:11,971 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 21:35:12,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:12,347 INFO L93 Difference]: Finished difference Result 103 states and 205 transitions. [2022-03-15 21:35:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 21:35:12,347 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 21:35:12,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:12,347 INFO L225 Difference]: With dead ends: 103 [2022-03-15 21:35:12,348 INFO L226 Difference]: Without dead ends: 92 [2022-03-15 21:35:12,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=284, Invalid=1696, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:35:12,348 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:12,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 10 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-15 21:35:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-03-15 21:35:12,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1265822784810124) internal successors, (168), 79 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 168 transitions. [2022-03-15 21:35:12,351 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 168 transitions. Word has length 17 [2022-03-15 21:35:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:12,351 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 168 transitions. [2022-03-15 21:35:12,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 21:35:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 168 transitions. [2022-03-15 21:35:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:35:12,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:12,352 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:12,374 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 21:35:12,569 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 21:35:12,569 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:12,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:12,570 INFO L85 PathProgramCache]: Analyzing trace with hash 787511058, now seen corresponding path program 19 times [2022-03-15 21:35:12,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:12,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551609877] [2022-03-15 21:35:12,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:12,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:12,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:12,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:12,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551609877] [2022-03-15 21:35:12,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551609877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:12,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333833066] [2022-03-15 21:35:12,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:35:12,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:12,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:12,731 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 21:35:12,733 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 21:35:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:12,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:35:12,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:12,986 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-15 21:35:12,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 16 [2022-03-15 21:35:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:13,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:13,316 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:35:13,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 116 [2022-03-15 21:35:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:13,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333833066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:13,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:13,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-15 21:35:13,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1721817135] [2022-03-15 21:35:13,493 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:13,494 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:13,496 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 35 transitions. [2022-03-15 21:35:13,496 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:13,717 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [6688#(and (<= 0 s) (= q_back q_front) (<= s 0)), 6686#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 6687#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:13,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:35:13,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:13,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:35:13,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:35:13,718 INFO L87 Difference]: Start difference. First operand 80 states and 168 transitions. Second operand has 15 states, 14 states have (on average 2.0) 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 21:35:14,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:14,124 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2022-03-15 21:35:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:35:14,124 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0) 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 17 [2022-03-15 21:35:14,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:14,124 INFO L225 Difference]: With dead ends: 101 [2022-03-15 21:35:14,124 INFO L226 Difference]: Without dead ends: 92 [2022-03-15 21:35:14,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:35:14,125 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:14,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:14,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-15 21:35:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2022-03-15 21:35:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1139240506329116) internal successors, (167), 79 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 167 transitions. [2022-03-15 21:35:14,129 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 167 transitions. Word has length 17 [2022-03-15 21:35:14,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:14,129 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 167 transitions. [2022-03-15 21:35:14,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0) 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 21:35:14,129 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 167 transitions. [2022-03-15 21:35:14,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:35:14,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:14,130 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:14,149 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 21:35:14,335 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 21:35:14,335 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:14,336 INFO L85 PathProgramCache]: Analyzing trace with hash -625476072, now seen corresponding path program 20 times [2022-03-15 21:35:14,338 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:14,338 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996607764] [2022-03-15 21:35:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:14,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:14,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:14,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996607764] [2022-03-15 21:35:14,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996607764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:14,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638394803] [2022-03-15 21:35:14,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:35:14,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:14,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:14,498 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 21:35:14,499 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 21:35:14,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:35:14,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:14,523 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:35:14,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:14,719 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-15 21:35:14,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2022-03-15 21:35:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:14,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:15,045 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:35:15,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 116 [2022-03-15 21:35:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:15,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638394803] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:15,169 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:15,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-15 21:35:15,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1211842475] [2022-03-15 21:35:15,169 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:15,170 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:15,172 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2022-03-15 21:35:15,172 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:15,342 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [7096#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 7097#(and (<= 0 s) (= q_back q_front) (<= s 0)), 7095#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:35:15,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:35:15,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:15,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:35:15,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:35:15,342 INFO L87 Difference]: Start difference. First operand 80 states and 167 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) 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 21:35:15,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:15,769 INFO L93 Difference]: Finished difference Result 99 states and 197 transitions. [2022-03-15 21:35:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 21:35:15,769 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) 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 17 [2022-03-15 21:35:15,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:15,770 INFO L225 Difference]: With dead ends: 99 [2022-03-15 21:35:15,770 INFO L226 Difference]: Without dead ends: 92 [2022-03-15 21:35:15,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=1534, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:35:15,771 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 12 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:15,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 6 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:15,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-15 21:35:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2022-03-15 21:35:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:15,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2022-03-15 21:35:15,772 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 17 [2022-03-15 21:35:15,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:15,773 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2022-03-15 21:35:15,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) 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 21:35:15,773 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2022-03-15 21:35:15,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:35:15,773 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:15,773 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:15,788 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 21:35:15,977 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 21:35:15,978 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:15,978 INFO L85 PathProgramCache]: Analyzing trace with hash -372620816, now seen corresponding path program 21 times [2022-03-15 21:35:15,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:15,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915012338] [2022-03-15 21:35:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:15,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:16,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:16,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915012338] [2022-03-15 21:35:16,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915012338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:16,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474276847] [2022-03-15 21:35:16,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:35:16,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:16,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:16,163 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 21:35:16,164 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 21:35:16,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:35:16,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:16,190 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-15 21:35:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:16,428 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 21:35:16,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 20 [2022-03-15 21:35:16,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:16,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:16,740 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:35:16,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 116 [2022-03-15 21:35:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:16,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474276847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:16,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:16,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 21:35:16,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1590060556] [2022-03-15 21:35:16,875 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:16,876 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:16,878 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 49 transitions. [2022-03-15 21:35:16,878 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:17,285 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [7503#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 7504#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 7502#(and (<= 3 N) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 2 q_front)) 1) (<= i 3)), 7505#(and (<= 0 s) (= q_back q_front) (<= s 0)), 7501#(and (<= 3 N) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 2 q_front)) 1) (<= N 3))] [2022-03-15 21:35:17,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:35:17,286 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:17,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:35:17,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=957, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:35:17,287 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 21:35:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:17,816 INFO L93 Difference]: Finished difference Result 119 states and 235 transitions. [2022-03-15 21:35:17,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:35:17,816 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 17 [2022-03-15 21:35:17,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:17,817 INFO L225 Difference]: With dead ends: 119 [2022-03-15 21:35:17,817 INFO L226 Difference]: Without dead ends: 116 [2022-03-15 21:35:17,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=194, Invalid=1968, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:35:17,818 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:17,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:17,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-15 21:35:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 84. [2022-03-15 21:35:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:17,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2022-03-15 21:35:17,820 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2022-03-15 21:35:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:17,820 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2022-03-15 21:35:17,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 21:35:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2022-03-15 21:35:17,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:35:17,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:17,820 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:17,838 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 21:35:18,027 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 21:35:18,027 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1043587210, now seen corresponding path program 22 times [2022-03-15 21:35:18,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:18,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051287993] [2022-03-15 21:35:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:18,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:18,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:18,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:18,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051287993] [2022-03-15 21:35:18,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051287993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:18,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221018645] [2022-03-15 21:35:18,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:35:18,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:18,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:18,186 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 21:35:18,187 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 21:35:18,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:35:18,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:18,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:35:18,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:18,429 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-15 21:35:18,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2022-03-15 21:35:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:18,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:18,755 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:35:18,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 116 [2022-03-15 21:35:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:18,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221018645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:18,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:18,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 21:35:18,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1569855586] [2022-03-15 21:35:18,871 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:18,872 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:18,874 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 41 transitions. [2022-03-15 21:35:18,874 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:19,162 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [7946#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 7947#(and (<= 0 s) (= q_back q_front) (<= s 0)), 7945#(and (<= 3 N) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 2 q_front)) 1) (<= i 3)), 7948#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:19,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:35:19,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:19,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:35:19,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:35:19,164 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 17 states, 16 states have (on average 2.0) 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 21:35:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:19,723 INFO L93 Difference]: Finished difference Result 129 states and 256 transitions. [2022-03-15 21:35:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:35:19,723 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) 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 17 [2022-03-15 21:35:19,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:19,724 INFO L225 Difference]: With dead ends: 129 [2022-03-15 21:35:19,724 INFO L226 Difference]: Without dead ends: 112 [2022-03-15 21:35:19,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=1794, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:35:19,724 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:19,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 10 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-15 21:35:19,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2022-03-15 21:35:19,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 171 transitions. [2022-03-15 21:35:19,726 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 171 transitions. Word has length 17 [2022-03-15 21:35:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:19,726 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 171 transitions. [2022-03-15 21:35:19,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) 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 21:35:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 171 transitions. [2022-03-15 21:35:19,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:35:19,727 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:19,727 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:19,742 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 21:35:19,939 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 21:35:19,940 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:19,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:19,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1896515280, now seen corresponding path program 23 times [2022-03-15 21:35:19,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:19,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910950183] [2022-03-15 21:35:19,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:19,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:20,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:20,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910950183] [2022-03-15 21:35:20,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910950183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:20,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555993794] [2022-03-15 21:35:20,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:35:20,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:20,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:20,106 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 21:35:20,107 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 21:35:20,131 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:35:20,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:20,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:35:20,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:20,350 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-15 21:35:20,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2022-03-15 21:35:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:20,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:20,666 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:35:20,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 116 [2022-03-15 21:35:20,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:20,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555993794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:20,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:20,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 21:35:20,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1721339524] [2022-03-15 21:35:20,787 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:20,788 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:20,790 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 39 transitions. [2022-03-15 21:35:20,790 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:21,047 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [8396#(and (<= 0 s) (= q_back q_front) (<= s 0)), 8394#(and (<= 3 N) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 2 q_front)) 1) (<= i 3)), 8395#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 8397#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:21,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:35:21,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:21,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:35:21,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:35:21,049 INFO L87 Difference]: Start difference. First operand 83 states and 171 transitions. Second operand has 17 states, 16 states have (on average 1.9375) 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 21:35:21,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:21,644 INFO L93 Difference]: Finished difference Result 142 states and 296 transitions. [2022-03-15 21:35:21,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:35:21,644 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) 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 17 [2022-03-15 21:35:21,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:21,644 INFO L225 Difference]: With dead ends: 142 [2022-03-15 21:35:21,644 INFO L226 Difference]: Without dead ends: 128 [2022-03-15 21:35:21,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=208, Invalid=1954, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:35:21,645 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:21,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 8 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:21,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-15 21:35:21,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 82. [2022-03-15 21:35:21,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0864197530864197) internal successors, (169), 81 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 169 transitions. [2022-03-15 21:35:21,647 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 169 transitions. Word has length 17 [2022-03-15 21:35:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:21,648 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 169 transitions. [2022-03-15 21:35:21,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) 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 21:35:21,648 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 169 transitions. [2022-03-15 21:35:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 21:35:21,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:21,648 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:21,669 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-15 21:35:21,855 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 21:35:21,855 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:21,856 INFO L85 PathProgramCache]: Analyzing trace with hash 985464886, now seen corresponding path program 24 times [2022-03-15 21:35:21,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:21,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752430454] [2022-03-15 21:35:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:21,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:22,022 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:22,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752430454] [2022-03-15 21:35:22,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752430454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:22,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232879686] [2022-03-15 21:35:22,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:22,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:22,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:22,023 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 21:35:22,025 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 21:35:22,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:35:22,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:22,047 WARN L261 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:35:22,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:22,226 INFO L353 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-03-15 21:35:22,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2022-03-15 21:35:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:22,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:22,583 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:35:22,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 116 [2022-03-15 21:35:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:22,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232879686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:22,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:22,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-15 21:35:22,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1507312676] [2022-03-15 21:35:22,701 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:22,702 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:22,704 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 37 transitions. [2022-03-15 21:35:22,704 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:22,946 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [8858#(and (<= 3 N) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 2 q_front)) 1) (<= i 3)), 8860#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 8861#(and (<= 0 s) (= q_back q_front) (<= s 0)), 8859#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:35:22,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:35:22,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:22,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:35:22,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:35:22,947 INFO L87 Difference]: Start difference. First operand 82 states and 169 transitions. Second operand has 17 states, 16 states have (on average 1.875) 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 21:35:23,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:23,561 INFO L93 Difference]: Finished difference Result 124 states and 244 transitions. [2022-03-15 21:35:23,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:35:23,561 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) 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 17 [2022-03-15 21:35:23,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:23,562 INFO L225 Difference]: With dead ends: 124 [2022-03-15 21:35:23,562 INFO L226 Difference]: Without dead ends: 117 [2022-03-15 21:35:23,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:35:23,563 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 542 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:23,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 7 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 542 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-15 21:35:23,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2022-03-15 21:35:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.088607594936709) internal successors, (165), 79 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:23,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2022-03-15 21:35:23,566 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2022-03-15 21:35:23,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:23,566 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2022-03-15 21:35:23,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) 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 21:35:23,566 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2022-03-15 21:35:23,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:35:23,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:23,566 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:23,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 21:35:23,775 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 21:35:23,775 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:23,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:23,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1333781516, now seen corresponding path program 25 times [2022-03-15 21:35:23,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:23,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236250108] [2022-03-15 21:35:23,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:23,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:23,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:23,815 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:23,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236250108] [2022-03-15 21:35:23,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236250108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:23,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981217855] [2022-03-15 21:35:23,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:35:23,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:23,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:23,816 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 21:35:23,818 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 21:35:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:23,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 21:35:23,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:23,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:23,896 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:23,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981217855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:23,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:23,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-15 21:35:23,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [380671350] [2022-03-15 21:35:23,896 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:23,897 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:23,900 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 52 transitions. [2022-03-15 21:35:23,900 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:23,997 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:35:23,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:35:23,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:23,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:35:23,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:35:23,998 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 21:35:24,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:24,050 INFO L93 Difference]: Finished difference Result 152 states and 296 transitions. [2022-03-15 21:35:24,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:35:24,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 21:35:24,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:24,051 INFO L225 Difference]: With dead ends: 152 [2022-03-15 21:35:24,051 INFO L226 Difference]: Without dead ends: 139 [2022-03-15 21:35:24,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:35:24,051 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:24,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 2 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:35:24,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-15 21:35:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 90. [2022-03-15 21:35:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.134831460674157) internal successors, (190), 89 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:24,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 190 transitions. [2022-03-15 21:35:24,053 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 190 transitions. Word has length 18 [2022-03-15 21:35:24,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:24,053 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 190 transitions. [2022-03-15 21:35:24,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 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 21:35:24,053 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 190 transitions. [2022-03-15 21:35:24,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:35:24,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:24,054 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:24,075 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 21:35:24,254 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 21:35:24,254 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:24,255 INFO L85 PathProgramCache]: Analyzing trace with hash -40718131, now seen corresponding path program 26 times [2022-03-15 21:35:24,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:24,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116048701] [2022-03-15 21:35:24,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:24,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:24,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:24,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116048701] [2022-03-15 21:35:24,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116048701] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:24,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148274331] [2022-03-15 21:35:24,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:35:24,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:24,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:24,312 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 21:35:24,312 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 21:35:24,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:35:24,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:24,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:35:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:24,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:24,397 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 21:35:24,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 21:35:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:24,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148274331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:24,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:24,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2022-03-15 21:35:24,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1383349128] [2022-03-15 21:35:24,427 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:24,428 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:24,430 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 38 transitions. [2022-03-15 21:35:24,430 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:24,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:35:24,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 21:35:24,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 21:35:24,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:35:24,482 INFO L87 Difference]: Start difference. First operand 90 states and 190 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:24,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:24,703 INFO L93 Difference]: Finished difference Result 239 states and 485 transitions. [2022-03-15 21:35:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 21:35:24,703 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:35:24,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:24,704 INFO L225 Difference]: With dead ends: 239 [2022-03-15 21:35:24,704 INFO L226 Difference]: Without dead ends: 239 [2022-03-15 21:35:24,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:35:24,705 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:24,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 13 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:24,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-03-15 21:35:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 119. [2022-03-15 21:35:24,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.3220338983050848) internal successors, (274), 118 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:24,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 274 transitions. [2022-03-15 21:35:24,710 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 274 transitions. Word has length 18 [2022-03-15 21:35:24,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:24,710 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 274 transitions. [2022-03-15 21:35:24,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:24,710 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 274 transitions. [2022-03-15 21:35:24,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:35:24,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:24,711 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:24,733 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 21:35:24,929 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 21:35:24,929 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:24,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:24,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2067391643, now seen corresponding path program 27 times [2022-03-15 21:35:24,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:24,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962584944] [2022-03-15 21:35:24,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:24,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:25,017 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 21:35:25,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:25,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962584944] [2022-03-15 21:35:25,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962584944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:25,018 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644461543] [2022-03-15 21:35:25,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:35:25,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:25,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:25,020 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 21:35:25,021 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 21:35:25,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:35:25,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:25,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:35:25,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:25,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:25,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 21:35:25,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:25,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:25,220 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:35:25,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:35:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:25,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644461543] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:25,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:25,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-03-15 21:35:25,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [825364443] [2022-03-15 21:35:25,246 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:25,247 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:25,250 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 40 transitions. [2022-03-15 21:35:25,250 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:25,335 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:35:25,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:35:25,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:25,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:35:25,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:35:25,336 INFO L87 Difference]: Start difference. First operand 119 states and 274 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 21:35:25,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:25,713 INFO L93 Difference]: Finished difference Result 281 states and 594 transitions. [2022-03-15 21:35:25,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:35:25,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 21:35:25,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:25,714 INFO L225 Difference]: With dead ends: 281 [2022-03-15 21:35:25,714 INFO L226 Difference]: Without dead ends: 281 [2022-03-15 21:35:25,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=1117, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:35:25,716 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 55 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:25,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 17 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-15 21:35:25,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 118. [2022-03-15 21:35:25,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2905982905982905) internal successors, (268), 117 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:25,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 268 transitions. [2022-03-15 21:35:25,719 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 268 transitions. Word has length 18 [2022-03-15 21:35:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:25,719 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 268 transitions. [2022-03-15 21:35:25,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 10 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 21:35:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 268 transitions. [2022-03-15 21:35:25,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:35:25,719 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:25,719 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:25,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 21:35:25,932 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 21:35:25,932 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:25,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:25,933 INFO L85 PathProgramCache]: Analyzing trace with hash -469761075, now seen corresponding path program 28 times [2022-03-15 21:35:25,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:25,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637491627] [2022-03-15 21:35:25,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:25,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:26,027 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 21:35:26,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:26,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637491627] [2022-03-15 21:35:26,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637491627] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:26,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207444362] [2022-03-15 21:35:26,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:35:26,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:26,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:26,028 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 21:35:26,029 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 21:35:26,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:35:26,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:26,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:35:26,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:26,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:26,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 21:35:26,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:26,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:26,208 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:35:26,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:35:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:26,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207444362] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:26,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:26,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-03-15 21:35:26,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1827396526] [2022-03-15 21:35:26,232 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:26,234 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:26,236 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 42 transitions. [2022-03-15 21:35:26,236 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:26,348 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:35:26,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:35:26,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:26,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:35:26,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:35:26,349 INFO L87 Difference]: Start difference. First operand 118 states and 268 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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 21:35:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:26,802 INFO L93 Difference]: Finished difference Result 283 states and 580 transitions. [2022-03-15 21:35:26,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:35:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-15 21:35:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:26,803 INFO L225 Difference]: With dead ends: 283 [2022-03-15 21:35:26,803 INFO L226 Difference]: Without dead ends: 283 [2022-03-15 21:35:26,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=272, Invalid=1450, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:35:26,804 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:26,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 17 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:26,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-15 21:35:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 96. [2022-03-15 21:35:26,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.126315789473684) internal successors, (202), 95 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:26,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 202 transitions. [2022-03-15 21:35:26,807 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 202 transitions. Word has length 18 [2022-03-15 21:35:26,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:26,807 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 202 transitions. [2022-03-15 21:35:26,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 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 21:35:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 202 transitions. [2022-03-15 21:35:26,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:35:26,808 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:26,808 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:26,824 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 21:35:27,016 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 21:35:27,017 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:27,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:27,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1812146277, now seen corresponding path program 29 times [2022-03-15 21:35:27,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:27,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373709996] [2022-03-15 21:35:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:27,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:27,092 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 21:35:27,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:27,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373709996] [2022-03-15 21:35:27,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373709996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:27,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933481448] [2022-03-15 21:35:27,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:35:27,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:27,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:27,094 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 21:35:27,094 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 21:35:27,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:35:27,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:27,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 21:35:27,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:27,209 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 21:35:27,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:27,249 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:35:27,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:35:27,270 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 21:35:27,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933481448] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:27,270 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:27,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-03-15 21:35:27,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1968453367] [2022-03-15 21:35:27,271 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:27,272 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:27,275 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 54 transitions. [2022-03-15 21:35:27,275 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:27,407 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:35:27,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:35:27,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:27,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:35:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:35:27,408 INFO L87 Difference]: Start difference. First operand 96 states and 202 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 21:35:27,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:27,679 INFO L93 Difference]: Finished difference Result 252 states and 525 transitions. [2022-03-15 21:35:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:35:27,679 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 21:35:27,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:27,680 INFO L225 Difference]: With dead ends: 252 [2022-03-15 21:35:27,680 INFO L226 Difference]: Without dead ends: 252 [2022-03-15 21:35:27,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:35:27,681 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:27,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 13 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:35:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-03-15 21:35:27,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 108. [2022-03-15 21:35:27,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.1401869158878504) internal successors, (229), 107 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 21:35:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 229 transitions. [2022-03-15 21:35:27,684 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 229 transitions. Word has length 18 [2022-03-15 21:35:27,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:27,684 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 229 transitions. [2022-03-15 21:35:27,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 21:35:27,684 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 229 transitions. [2022-03-15 21:35:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:27,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:27,685 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:27,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-15 21:35:27,896 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 21:35:27,896 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:27,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:27,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1262137137, now seen corresponding path program 30 times [2022-03-15 21:35:27,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:27,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73836172] [2022-03-15 21:35:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:27,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:28,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:28,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73836172] [2022-03-15 21:35:28,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73836172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:28,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70201138] [2022-03-15 21:35:28,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:28,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:28,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:28,110 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 21:35:28,112 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 21:35:28,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:35:28,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:28,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-15 21:35:28,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:28,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:28,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:28,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:28,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:28,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:28,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:28,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:28,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:28,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:28,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:35:28,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 36 [2022-03-15 21:35:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:28,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:29,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,046 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:29,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:35:29,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 76 treesize of output 140 [2022-03-15 21:35:29,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:29,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70201138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:29,314 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:29,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 34 [2022-03-15 21:35:29,314 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [782553395] [2022-03-15 21:35:29,314 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:29,315 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:29,318 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 21:35:29,318 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:29,635 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [12319#(and (<= 0 s) (= q_back q_front) (<= s 0)), 12316#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 12318#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 12317#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:35:29,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:35:29,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:29,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:35:29,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 21:35:29,637 INFO L87 Difference]: Start difference. First operand 108 states and 229 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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 21:35:30,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:30,085 INFO L93 Difference]: Finished difference Result 136 states and 275 transitions. [2022-03-15 21:35:30,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 21:35:30,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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 21:35:30,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:30,086 INFO L225 Difference]: With dead ends: 136 [2022-03-15 21:35:30,086 INFO L226 Difference]: Without dead ends: 127 [2022-03-15 21:35:30,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=380, Invalid=2272, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:35:30,087 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:30,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 8 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:30,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-15 21:35:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 109. [2022-03-15 21:35:30,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.138888888888889) internal successors, (231), 108 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 231 transitions. [2022-03-15 21:35:30,090 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 231 transitions. Word has length 19 [2022-03-15 21:35:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:30,090 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 231 transitions. [2022-03-15 21:35:30,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 15 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 21:35:30,090 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 231 transitions. [2022-03-15 21:35:30,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:30,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:30,091 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:30,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-15 21:35:30,310 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 21:35:30,310 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:30,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1619843029, now seen corresponding path program 31 times [2022-03-15 21:35:30,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:30,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389239147] [2022-03-15 21:35:30,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:30,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:30,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:30,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389239147] [2022-03-15 21:35:30,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389239147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:30,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296634551] [2022-03-15 21:35:30,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:35:30,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:30,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:30,491 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 21:35:30,492 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 21:35:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:30,516 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:35:30,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:30,764 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 21:35:30,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2022-03-15 21:35:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:30,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:31,225 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:35:31,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 80 treesize of output 190 [2022-03-15 21:35:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:31,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296634551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:31,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:31,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-15 21:35:31,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [918051633] [2022-03-15 21:35:31,460 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:31,461 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:31,464 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 39 transitions. [2022-03-15 21:35:31,465 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:31,716 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [12840#(and (<= 0 s) (= q_back q_front) (<= s 0)), 12837#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 12838#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 12839#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:31,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:35:31,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:31,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:35:31,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:35:31,717 INFO L87 Difference]: Start difference. First operand 109 states and 231 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 21:35:32,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:32,225 INFO L93 Difference]: Finished difference Result 137 states and 275 transitions. [2022-03-15 21:35:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:35:32,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 19 [2022-03-15 21:35:32,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:32,226 INFO L225 Difference]: With dead ends: 137 [2022-03-15 21:35:32,226 INFO L226 Difference]: Without dead ends: 130 [2022-03-15 21:35:32,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:35:32,227 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:32,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 7 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:32,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-15 21:35:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 108. [2022-03-15 21:35:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.1401869158878504) internal successors, (229), 107 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 21:35:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 229 transitions. [2022-03-15 21:35:32,229 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 229 transitions. Word has length 19 [2022-03-15 21:35:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:32,229 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 229 transitions. [2022-03-15 21:35:32,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 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 21:35:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 229 transitions. [2022-03-15 21:35:32,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:32,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:32,230 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:32,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-15 21:35:32,439 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 21:35:32,439 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:32,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash 335493431, now seen corresponding path program 32 times [2022-03-15 21:35:32,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:32,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174712114] [2022-03-15 21:35:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:32,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:32,616 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:32,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:32,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174712114] [2022-03-15 21:35:32,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174712114] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:32,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644265974] [2022-03-15 21:35:32,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:35:32,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:32,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:32,617 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 21:35:32,618 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 21:35:32,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:35:32,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:32,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:35:32,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:32,964 INFO L353 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-03-15 21:35:32,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 26 [2022-03-15 21:35:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:33,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:33,484 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:35:33,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 80 treesize of output 190 [2022-03-15 21:35:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:33,771 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644265974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:33,771 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:33,771 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-03-15 21:35:33,771 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [931024347] [2022-03-15 21:35:33,771 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:33,772 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:33,775 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 43 transitions. [2022-03-15 21:35:33,775 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:34,089 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [13361#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 13360#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 13363#(and (<= 0 s) (= q_back q_front) (<= s 0)), 13362#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:34,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:35:34,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:34,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:35:34,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:35:34,090 INFO L87 Difference]: Start difference. First operand 108 states and 229 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 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 21:35:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:34,637 INFO L93 Difference]: Finished difference Result 137 states and 276 transitions. [2022-03-15 21:35:34,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:35:34,637 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 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 19 [2022-03-15 21:35:34,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:34,638 INFO L225 Difference]: With dead ends: 137 [2022-03-15 21:35:34,638 INFO L226 Difference]: Without dead ends: 126 [2022-03-15 21:35:34,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:35:34,638 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:34,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 10 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:34,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-15 21:35:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 109. [2022-03-15 21:35:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.138888888888889) internal successors, (231), 108 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 231 transitions. [2022-03-15 21:35:34,641 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 231 transitions. Word has length 19 [2022-03-15 21:35:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:34,641 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 231 transitions. [2022-03-15 21:35:34,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 16 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 21:35:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 231 transitions. [2022-03-15 21:35:34,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:34,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:34,641 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:34,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:34,855 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 21:35:34,855 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:34,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:34,856 INFO L85 PathProgramCache]: Analyzing trace with hash -517434639, now seen corresponding path program 33 times [2022-03-15 21:35:34,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:34,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122634713] [2022-03-15 21:35:34,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:34,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:35,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:35,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122634713] [2022-03-15 21:35:35,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122634713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:35,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978168865] [2022-03-15 21:35:35,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:35:35,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:35,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:35,041 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 21:35:35,042 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 21:35:35,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:35:35,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:35,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-15 21:35:35,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:35,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:35,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:35,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:35,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:35,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:35,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:35,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:35:35,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 69 [2022-03-15 21:35:35,570 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:35,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:36,125 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:35:36,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 143 [2022-03-15 21:35:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:36,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978168865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:36,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:36,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 14] total 35 [2022-03-15 21:35:36,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [410568567] [2022-03-15 21:35:36,331 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:36,332 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:36,334 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 21:35:36,334 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:36,637 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [13891#(and (<= 0 s) (= q_back q_front) (<= s 0)), 13890#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 13893#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 13892#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:35:36,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:35:36,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:36,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:35:36,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:35:36,638 INFO L87 Difference]: Start difference. First operand 109 states and 231 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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 21:35:37,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:37,217 INFO L93 Difference]: Finished difference Result 139 states and 281 transitions. [2022-03-15 21:35:37,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:35:37,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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 21:35:37,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:37,218 INFO L225 Difference]: With dead ends: 139 [2022-03-15 21:35:37,218 INFO L226 Difference]: Without dead ends: 130 [2022-03-15 21:35:37,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=412, Invalid=2558, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:35:37,219 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:37,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 8 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:37,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-15 21:35:37,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2022-03-15 21:35:37,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1376146788990824) internal successors, (233), 109 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:37,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 233 transitions. [2022-03-15 21:35:37,221 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 233 transitions. Word has length 19 [2022-03-15 21:35:37,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:37,221 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 233 transitions. [2022-03-15 21:35:37,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 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 21:35:37,221 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 233 transitions. [2022-03-15 21:35:37,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:37,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:37,222 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:37,238 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 21:35:37,427 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 21:35:37,427 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:37,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:37,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1930421769, now seen corresponding path program 34 times [2022-03-15 21:35:37,428 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:37,428 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842954467] [2022-03-15 21:35:37,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:37,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:37,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:37,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842954467] [2022-03-15 21:35:37,651 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842954467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:37,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446305186] [2022-03-15 21:35:37,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:35:37,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:37,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:37,656 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 21:35:37,657 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 21:35:37,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:35:37,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:37,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:35:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:37,959 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 21:35:37,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2022-03-15 21:35:38,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:38,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:38,454 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:35:38,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 80 treesize of output 190 [2022-03-15 21:35:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:38,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446305186] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:38,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:38,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 21:35:38,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [288247481] [2022-03-15 21:35:38,687 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:38,688 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:38,691 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 39 transitions. [2022-03-15 21:35:38,691 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:38,968 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [14424#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 14423#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (= (select q (+ 2 q_front)) 1) (<= i 3)), 14426#(and (<= 0 s) (= q_back q_front) (<= s 0)), 14425#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:38,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:35:38,968 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:38,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:35:38,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1287, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 21:35:38,969 INFO L87 Difference]: Start difference. First operand 110 states and 233 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) 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 21:35:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:39,688 INFO L93 Difference]: Finished difference Result 155 states and 313 transitions. [2022-03-15 21:35:39,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:35:39,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) 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 19 [2022-03-15 21:35:39,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:39,688 INFO L225 Difference]: With dead ends: 155 [2022-03-15 21:35:39,689 INFO L226 Difference]: Without dead ends: 148 [2022-03-15 21:35:39,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=269, Invalid=2923, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:35:39,689 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:39,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-15 21:35:39,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 119. [2022-03-15 21:35:39,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1440677966101696) internal successors, (253), 118 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:39,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 253 transitions. [2022-03-15 21:35:39,691 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 253 transitions. Word has length 19 [2022-03-15 21:35:39,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:39,691 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 253 transitions. [2022-03-15 21:35:39,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) 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 21:35:39,692 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 253 transitions. [2022-03-15 21:35:39,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:39,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:39,692 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:39,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 21:35:39,905 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 21:35:39,905 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:39,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1677566513, now seen corresponding path program 35 times [2022-03-15 21:35:39,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:39,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783358585] [2022-03-15 21:35:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:39,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:40,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:40,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:40,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783358585] [2022-03-15 21:35:40,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783358585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:40,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342005322] [2022-03-15 21:35:40,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:35:40,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:40,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:40,139 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 21:35:40,140 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 21:35:40,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:35:40,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:40,167 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-15 21:35:40,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:40,488 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 21:35:40,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2022-03-15 21:35:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:40,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:40,965 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:35:40,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 193 [2022-03-15 21:35:41,219 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:41,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342005322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:41,219 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:41,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-03-15 21:35:41,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [146378767] [2022-03-15 21:35:41,219 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:41,220 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:41,223 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 45 transitions. [2022-03-15 21:35:41,223 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:41,562 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [15000#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 15002#(and (<= 0 s) (= q_back q_front) (<= s 0)), 15001#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 14999#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:35:41,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:35:41,563 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:41,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:35:41,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1216, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:35:41,563 INFO L87 Difference]: Start difference. First operand 119 states and 253 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 21:35:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:42,137 INFO L93 Difference]: Finished difference Result 147 states and 297 transitions. [2022-03-15 21:35:42,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 21:35:42,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:35:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:42,138 INFO L225 Difference]: With dead ends: 147 [2022-03-15 21:35:42,138 INFO L226 Difference]: Without dead ends: 134 [2022-03-15 21:35:42,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=207, Invalid=2243, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:35:42,138 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:42,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 13 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:42,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-15 21:35:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2022-03-15 21:35:42,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.1271186440677967) internal successors, (251), 118 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:42,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 251 transitions. [2022-03-15 21:35:42,140 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 251 transitions. Word has length 19 [2022-03-15 21:35:42,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:42,140 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 251 transitions. [2022-03-15 21:35:42,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 21:35:42,141 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 251 transitions. [2022-03-15 21:35:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:42,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:42,141 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:42,157 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 21:35:42,357 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 21:35:42,357 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:42,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:42,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1946434389, now seen corresponding path program 36 times [2022-03-15 21:35:42,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:42,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633780499] [2022-03-15 21:35:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:42,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:42,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:42,572 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:42,572 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:42,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633780499] [2022-03-15 21:35:42,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633780499] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:42,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494879730] [2022-03-15 21:35:42,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:42,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:42,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:42,573 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 21:35:42,574 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 21:35:42,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:35:42,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:42,601 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-15 21:35:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:42,967 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 21:35:42,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 111 treesize of output 59 [2022-03-15 21:35:43,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:43,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:43,619 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:35:43,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 106 treesize of output 202 [2022-03-15 21:35:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:43,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494879730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:43,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:43,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 33 [2022-03-15 21:35:43,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1525843566] [2022-03-15 21:35:43,891 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:43,892 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:43,895 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 43 transitions. [2022-03-15 21:35:43,895 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:44,239 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [15560#(and (<= 0 s) (= q_back q_front) (<= s 0)), 15557#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 15558#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 15559#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:44,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:35:44,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:44,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:35:44,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1351, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:35:44,240 INFO L87 Difference]: Start difference. First operand 119 states and 251 transitions. Second operand has 18 states, 17 states have (on average 2.0) 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 21:35:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:44,865 INFO L93 Difference]: Finished difference Result 145 states and 293 transitions. [2022-03-15 21:35:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:35:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) 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 19 [2022-03-15 21:35:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:44,867 INFO L225 Difference]: With dead ends: 145 [2022-03-15 21:35:44,867 INFO L226 Difference]: Without dead ends: 134 [2022-03-15 21:35:44,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=240, Invalid=2516, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:35:44,867 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:44,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 11 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:44,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-15 21:35:44,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 119. [2022-03-15 21:35:44,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.110169491525424) internal successors, (249), 118 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:44,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 249 transitions. [2022-03-15 21:35:44,870 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 249 transitions. Word has length 19 [2022-03-15 21:35:44,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:44,871 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 249 transitions. [2022-03-15 21:35:44,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) 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 21:35:44,871 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 249 transitions. [2022-03-15 21:35:44,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:44,871 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:44,871 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:44,896 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 21:35:45,084 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 21:35:45,084 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:45,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:45,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1093506319, now seen corresponding path program 37 times [2022-03-15 21:35:45,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:45,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87425254] [2022-03-15 21:35:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:45,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:45,290 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:45,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:45,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87425254] [2022-03-15 21:35:45,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87425254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:45,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255995277] [2022-03-15 21:35:45,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:35:45,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:45,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:45,292 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 21:35:45,293 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 21:35:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:45,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:35:45,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:45,641 INFO L353 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-03-15 21:35:45,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 26 [2022-03-15 21:35:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:45,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:46,143 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:35:46,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 80 treesize of output 190 [2022-03-15 21:35:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:46,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255995277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:46,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:46,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-03-15 21:35:46,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [44277482] [2022-03-15 21:35:46,379 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:46,380 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:46,383 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 41 transitions. [2022-03-15 21:35:46,383 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:46,672 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [16113#(and (<= 0 s) (= q_back q_front) (<= s 0)), 16114#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 16115#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 16116#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:46,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:35:46,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:46,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:35:46,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:35:46,673 INFO L87 Difference]: Start difference. First operand 119 states and 249 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:47,299 INFO L93 Difference]: Finished difference Result 144 states and 291 transitions. [2022-03-15 21:35:47,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:35:47,300 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-15 21:35:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:47,300 INFO L225 Difference]: With dead ends: 144 [2022-03-15 21:35:47,300 INFO L226 Difference]: Without dead ends: 135 [2022-03-15 21:35:47,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=236, Invalid=2416, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:35:47,301 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:47,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 9 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-15 21:35:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2022-03-15 21:35:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 2.0948275862068964) internal successors, (243), 116 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 243 transitions. [2022-03-15 21:35:47,303 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 243 transitions. Word has length 19 [2022-03-15 21:35:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:47,304 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 243 transitions. [2022-03-15 21:35:47,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 243 transitions. [2022-03-15 21:35:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:47,304 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:47,304 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:47,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-15 21:35:47,504 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 21:35:47,505 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:47,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:47,505 INFO L85 PathProgramCache]: Analyzing trace with hash -319480811, now seen corresponding path program 38 times [2022-03-15 21:35:47,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:47,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866966787] [2022-03-15 21:35:47,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:47,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:47,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:47,710 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:35:47,710 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:47,710 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866966787] [2022-03-15 21:35:47,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866966787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:47,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134443118] [2022-03-15 21:35:47,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:35:47,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:47,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:47,712 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 21:35:47,712 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 21:35:47,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:35:47,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:47,741 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:35:47,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:48,005 INFO L353 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-03-15 21:35:48,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 26 [2022-03-15 21:35:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:48,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:48,506 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:35:48,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 80 treesize of output 190 [2022-03-15 21:35:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:48,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134443118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:48,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:48,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-03-15 21:35:48,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1738326687] [2022-03-15 21:35:48,731 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:48,733 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:48,735 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 39 transitions. [2022-03-15 21:35:48,736 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:49,002 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [16668#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 16669#(and (<= 0 s) (= q_back q_front) (<= s 0)), 16667#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 16666#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:35:49,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:35:49,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:49,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:35:49,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:35:49,003 INFO L87 Difference]: Start difference. First operand 117 states and 243 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) 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 21:35:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:49,638 INFO L93 Difference]: Finished difference Result 141 states and 282 transitions. [2022-03-15 21:35:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:35:49,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) 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 19 [2022-03-15 21:35:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:49,639 INFO L225 Difference]: With dead ends: 141 [2022-03-15 21:35:49,639 INFO L226 Difference]: Without dead ends: 134 [2022-03-15 21:35:49,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=2514, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:35:49,640 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:49,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 7 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:35:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-15 21:35:49,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2022-03-15 21:35:49,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.13) internal successors, (213), 100 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 21:35:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 213 transitions. [2022-03-15 21:35:49,642 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 213 transitions. Word has length 19 [2022-03-15 21:35:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:49,642 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 213 transitions. [2022-03-15 21:35:49,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) 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 21:35:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 213 transitions. [2022-03-15 21:35:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:49,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:49,642 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:49,658 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 21:35:49,855 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 21:35:49,855 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:49,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:49,856 INFO L85 PathProgramCache]: Analyzing trace with hash 342084663, now seen corresponding path program 39 times [2022-03-15 21:35:49,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:49,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064100512] [2022-03-15 21:35:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:49,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:50,082 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:50,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064100512] [2022-03-15 21:35:50,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064100512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:50,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819490093] [2022-03-15 21:35:50,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:35:50,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:50,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:50,084 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 21:35:50,084 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 21:35:50,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:35:50,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:50,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-15 21:35:50,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:50,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:35:50,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:50,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 68 [2022-03-15 21:35:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:50,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:51,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:35:51,338 INFO L353 Elim1Store]: treesize reduction 66, result has 55.7 percent of original size [2022-03-15 21:35:51,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 94 treesize of output 126 [2022-03-15 21:35:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:51,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819490093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:51,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:51,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 37 [2022-03-15 21:35:51,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1863861924] [2022-03-15 21:35:51,584 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:51,585 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:51,588 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 57 transitions. [2022-03-15 21:35:51,588 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:52,201 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [17192#(and (<= 0 s) (= q_back q_front) (<= s 0)), 17196#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 17195#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 17194#(and (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= 4 N)), 17197#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 17193#(and (<= N 4) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 4 N))] [2022-03-15 21:35:52,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:35:52,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:35:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1669, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 21:35:52,202 INFO L87 Difference]: Start difference. First operand 101 states and 213 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 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 21:35:53,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:53,008 INFO L93 Difference]: Finished difference Result 147 states and 293 transitions. [2022-03-15 21:35:53,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:35:53,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 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 19 [2022-03-15 21:35:53,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:53,009 INFO L225 Difference]: With dead ends: 147 [2022-03-15 21:35:53,009 INFO L226 Difference]: Without dead ends: 144 [2022-03-15 21:35:53,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=505, Invalid=3277, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:35:53,010 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:53,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 16 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 878 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:35:53,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-03-15 21:35:53,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 107. [2022-03-15 21:35:53,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 2.1037735849056602) internal successors, (223), 106 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 223 transitions. [2022-03-15 21:35:53,012 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 223 transitions. Word has length 19 [2022-03-15 21:35:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:53,012 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 223 transitions. [2022-03-15 21:35:53,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 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 21:35:53,012 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 223 transitions. [2022-03-15 21:35:53,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:53,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:53,013 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:53,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-15 21:35:53,229 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 21:35:53,230 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1016962929, now seen corresponding path program 40 times [2022-03-15 21:35:53,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:53,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662833484] [2022-03-15 21:35:53,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:53,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:53,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:53,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662833484] [2022-03-15 21:35:53,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662833484] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:53,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64494458] [2022-03-15 21:35:53,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:35:53,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:53,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:53,485 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 21:35:53,486 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 21:35:53,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:35:53,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:53,510 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:35:53,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:53,838 INFO L353 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-03-15 21:35:53,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 26 [2022-03-15 21:35:53,917 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:53,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:54,332 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:35:54,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 80 treesize of output 190 [2022-03-15 21:35:54,555 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:54,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64494458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:54,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:54,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 21:35:54,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [527555318] [2022-03-15 21:35:54,556 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:54,557 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:54,560 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 49 transitions. [2022-03-15 21:35:54,560 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:54,996 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [17735#(and (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= 4 N)), 17738#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 17736#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 17737#(and (<= 0 s) (= q_back q_front) (<= s 0)), 17739#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:35:54,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:35:54,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:54,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:35:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:35:54,997 INFO L87 Difference]: Start difference. First operand 107 states and 223 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 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 21:35:55,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:55,692 INFO L93 Difference]: Finished difference Result 157 states and 314 transitions. [2022-03-15 21:35:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:35:55,693 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 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 19 [2022-03-15 21:35:55,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:55,694 INFO L225 Difference]: With dead ends: 157 [2022-03-15 21:35:55,694 INFO L226 Difference]: Without dead ends: 136 [2022-03-15 21:35:55,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:35:55,694 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:55,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 12 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:35:55,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-15 21:35:55,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 106. [2022-03-15 21:35:55,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.104761904761905) internal successors, (221), 105 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:55,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 221 transitions. [2022-03-15 21:35:55,696 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 221 transitions. Word has length 19 [2022-03-15 21:35:55,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:55,696 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 221 transitions. [2022-03-15 21:35:55,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 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 21:35:55,697 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 221 transitions. [2022-03-15 21:35:55,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:55,697 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:55,697 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:55,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 21:35:55,897 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 21:35:55,897 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:55,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:55,898 INFO L85 PathProgramCache]: Analyzing trace with hash 345996535, now seen corresponding path program 41 times [2022-03-15 21:35:55,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:55,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259011176] [2022-03-15 21:35:55,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:55,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:55,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:56,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:56,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259011176] [2022-03-15 21:35:56,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259011176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:56,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766574828] [2022-03-15 21:35:56,139 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:35:56,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:56,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:56,148 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 21:35:56,149 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 21:35:56,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:35:56,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:56,176 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 62 conjunts are in the unsatisfiable core [2022-03-15 21:35:56,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:56,509 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 21:35:56,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 20 [2022-03-15 21:35:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:56,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:57,021 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:35:57,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 87 treesize of output 193 [2022-03-15 21:35:57,224 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:57,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766574828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:57,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:57,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 21:35:57,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [690781676] [2022-03-15 21:35:57,224 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:57,225 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:57,228 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 47 transitions. [2022-03-15 21:35:57,228 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:35:57,632 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [18287#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 18283#(and (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= 4 N)), 18286#(and (<= 0 s) (= q_back q_front) (<= s 0)), 18284#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 18285#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:35:57,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:35:57,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:35:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:35:57,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:35:57,633 INFO L87 Difference]: Start difference. First operand 106 states and 221 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) 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 21:35:58,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:35:58,449 INFO L93 Difference]: Finished difference Result 169 states and 340 transitions. [2022-03-15 21:35:58,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:35:58,449 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) 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 19 [2022-03-15 21:35:58,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:35:58,450 INFO L225 Difference]: With dead ends: 169 [2022-03-15 21:35:58,450 INFO L226 Difference]: Without dead ends: 152 [2022-03-15 21:35:58,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=250, Invalid=2942, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:35:58,451 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:35:58,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 11 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:35:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-03-15 21:35:58,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2022-03-15 21:35:58,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.105769230769231) internal successors, (219), 104 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:35:58,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 219 transitions. [2022-03-15 21:35:58,453 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 219 transitions. Word has length 19 [2022-03-15 21:35:58,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:35:58,453 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 219 transitions. [2022-03-15 21:35:58,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) 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 21:35:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 219 transitions. [2022-03-15 21:35:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:35:58,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:35:58,453 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:35:58,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-15 21:35:58,663 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 21:35:58,663 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:35:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:35:58,664 INFO L85 PathProgramCache]: Analyzing trace with hash -506931535, now seen corresponding path program 42 times [2022-03-15 21:35:58,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:35:58,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421369596] [2022-03-15 21:35:58,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:35:58,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:35:58,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:35:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:58,892 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:35:58,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421369596] [2022-03-15 21:35:58,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421369596] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:35:58,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053776385] [2022-03-15 21:35:58,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:35:58,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:35:58,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:35:58,893 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 21:35:58,894 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 21:35:58,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:35:58,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:35:58,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:35:58,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:35:59,258 INFO L353 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-03-15 21:35:59,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 26 [2022-03-15 21:35:59,337 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:59,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:35:59,750 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:35:59,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 80 treesize of output 190 [2022-03-15 21:35:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:35:59,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053776385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:35:59,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:35:59,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 21:35:59,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1749716581] [2022-03-15 21:35:59,954 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:35:59,956 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:35:59,958 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 45 transitions. [2022-03-15 21:35:59,958 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:00,324 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [18846#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 18847#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 18848#(and (<= 0 s) (= q_back q_front) (<= s 0)), 18845#(and (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= 4 N)), 18849#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:36:00,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:36:00,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:00,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:36:00,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1365, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:36:00,325 INFO L87 Difference]: Start difference. First operand 105 states and 219 transitions. Second operand has 20 states, 19 states have (on average 1.894736842105263) 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 21:36:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:01,217 INFO L93 Difference]: Finished difference Result 185 states and 389 transitions. [2022-03-15 21:36:01,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:36:01,221 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.894736842105263) 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 19 [2022-03-15 21:36:01,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:01,222 INFO L225 Difference]: With dead ends: 185 [2022-03-15 21:36:01,222 INFO L226 Difference]: Without dead ends: 171 [2022-03-15 21:36:01,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=3153, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:36:01,222 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:01,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 9 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:01,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-15 21:36:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 104. [2022-03-15 21:36:01,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.1067961165048543) internal successors, (217), 103 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 217 transitions. [2022-03-15 21:36:01,225 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 217 transitions. Word has length 19 [2022-03-15 21:36:01,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:01,225 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 217 transitions. [2022-03-15 21:36:01,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.894736842105263) 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 21:36:01,226 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 217 transitions. [2022-03-15 21:36:01,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 21:36:01,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:01,226 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:01,242 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 21:36:01,435 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 21:36:01,435 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:01,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:01,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1919918665, now seen corresponding path program 43 times [2022-03-15 21:36:01,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:01,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216810517] [2022-03-15 21:36:01,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:01,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:01,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:01,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216810517] [2022-03-15 21:36:01,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216810517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:01,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746191113] [2022-03-15 21:36:01,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:36:01,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:01,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:01,660 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 21:36:01,663 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 21:36:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:01,688 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 21:36:01,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:01,957 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 21:36:01,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 26 [2022-03-15 21:36:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:02,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:02,477 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:36:02,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 80 treesize of output 190 [2022-03-15 21:36:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:02,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746191113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:02,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:02,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-15 21:36:02,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [67204134] [2022-03-15 21:36:02,725 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:02,726 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:02,729 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 43 transitions. [2022-03-15 21:36:02,729 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:03,074 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [19429#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 19425#(and (<= 0 s) (= q_back q_front) (<= s 0)), 19427#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 19428#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 19426#(and (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= 4 N))] [2022-03-15 21:36:03,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:36:03,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:03,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:36:03,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 21:36:03,075 INFO L87 Difference]: Start difference. First operand 104 states and 217 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) 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 21:36:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:03,980 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2022-03-15 21:36:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:36:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) 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 19 [2022-03-15 21:36:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:03,981 INFO L225 Difference]: With dead ends: 164 [2022-03-15 21:36:03,981 INFO L226 Difference]: Without dead ends: 157 [2022-03-15 21:36:03,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=281, Invalid=3379, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:36:03,982 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:03,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 7 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:03,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-15 21:36:03,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 102. [2022-03-15 21:36:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.108910891089109) internal successors, (213), 101 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 21:36:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 213 transitions. [2022-03-15 21:36:03,984 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 213 transitions. Word has length 19 [2022-03-15 21:36:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:03,984 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 213 transitions. [2022-03-15 21:36:03,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) 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 21:36:03,984 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 213 transitions. [2022-03-15 21:36:03,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:36:03,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:03,984 INFO L514 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:04,005 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 21:36:04,195 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 21:36:04,195 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:04,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:04,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2014814885, now seen corresponding path program 44 times [2022-03-15 21:36:04,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:04,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389273285] [2022-03-15 21:36:04,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:04,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:04,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:04,235 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:04,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389273285] [2022-03-15 21:36:04,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389273285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:04,235 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283984753] [2022-03-15 21:36:04,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:36:04,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:04,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:04,236 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 21:36:04,237 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 21:36:04,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:36:04,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:04,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 21:36:04,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:04,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:04,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:04,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283984753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:04,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:04,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-15 21:36:04,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1224422586] [2022-03-15 21:36:04,324 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:04,325 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:04,328 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 60 transitions. [2022-03-15 21:36:04,328 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:04,421 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:36:04,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:36:04,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:04,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:36:04,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:36:04,422 INFO L87 Difference]: Start difference. First operand 102 states and 213 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:04,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:04,476 INFO L93 Difference]: Finished difference Result 197 states and 388 transitions. [2022-03-15 21:36:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 21:36:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:36:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:04,477 INFO L225 Difference]: With dead ends: 197 [2022-03-15 21:36:04,477 INFO L226 Difference]: Without dead ends: 182 [2022-03-15 21:36:04,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:36:04,479 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:04,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 2 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:36:04,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-15 21:36:04,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 115. [2022-03-15 21:36:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.1403508771929824) internal successors, (244), 114 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:04,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 244 transitions. [2022-03-15 21:36:04,481 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 244 transitions. Word has length 20 [2022-03-15 21:36:04,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:04,481 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 244 transitions. [2022-03-15 21:36:04,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:04,481 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 244 transitions. [2022-03-15 21:36:04,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:36:04,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:04,481 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:04,499 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 21:36:04,682 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 21:36:04,682 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:04,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:04,682 INFO L85 PathProgramCache]: Analyzing trace with hash 86705004, now seen corresponding path program 45 times [2022-03-15 21:36:04,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:04,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182524875] [2022-03-15 21:36:04,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:04,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:04,745 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:04,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182524875] [2022-03-15 21:36:04,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182524875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:04,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266184917] [2022-03-15 21:36:04,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:36:04,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:04,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:04,747 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 21:36:04,752 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 21:36:04,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:36:04,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:04,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:36:04,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:04,840 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:04,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:04,873 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 21:36:04,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 21:36:04,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:04,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266184917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:04,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:04,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 10 [2022-03-15 21:36:04,910 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1516853685] [2022-03-15 21:36:04,910 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:04,911 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:04,914 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 44 transitions. [2022-03-15 21:36:04,914 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:04,980 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:36:04,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:36:04,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:04,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:36:04,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:36:04,981 INFO L87 Difference]: Start difference. First operand 115 states and 244 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 21:36:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:05,248 INFO L93 Difference]: Finished difference Result 302 states and 612 transitions. [2022-03-15 21:36:05,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 21:36:05,249 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:36:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:05,249 INFO L225 Difference]: With dead ends: 302 [2022-03-15 21:36:05,250 INFO L226 Difference]: Without dead ends: 302 [2022-03-15 21:36:05,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 44 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:36:05,250 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:05,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 15 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:36:05,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-15 21:36:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 152. [2022-03-15 21:36:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.337748344370861) internal successors, (353), 151 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:05,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 353 transitions. [2022-03-15 21:36:05,253 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 353 transitions. Word has length 20 [2022-03-15 21:36:05,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:05,253 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 353 transitions. [2022-03-15 21:36:05,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 8 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 21:36:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 353 transitions. [2022-03-15 21:36:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:36:05,253 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:05,253 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:05,271 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-15 21:36:05,454 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 21:36:05,454 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:05,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:05,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1939968508, now seen corresponding path program 46 times [2022-03-15 21:36:05,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:05,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082033724] [2022-03-15 21:36:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:05,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:05,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:05,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:05,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082033724] [2022-03-15 21:36:05,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082033724] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:05,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057013137] [2022-03-15 21:36:05,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:36:05,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:05,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:05,552 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 21:36:05,553 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 21:36:05,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:36:05,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:05,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:36:05,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:05,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:05,666 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:36:05,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:36:05,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:05,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057013137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:05,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:05,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2022-03-15 21:36:05,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1725161590] [2022-03-15 21:36:05,698 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:05,700 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:05,703 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 46 transitions. [2022-03-15 21:36:05,703 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:05,779 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:36:05,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:36:05,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:05,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:36:05,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:36:05,780 INFO L87 Difference]: Start difference. First operand 152 states and 353 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 21:36:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:06,253 INFO L93 Difference]: Finished difference Result 597 states and 1239 transitions. [2022-03-15 21:36:06,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:36:06,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 21:36:06,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:06,256 INFO L225 Difference]: With dead ends: 597 [2022-03-15 21:36:06,256 INFO L226 Difference]: Without dead ends: 597 [2022-03-15 21:36:06,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:36:06,256 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 119 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:06,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 17 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:36:06,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-03-15 21:36:06,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 195. [2022-03-15 21:36:06,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.422680412371134) internal successors, (470), 194 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:06,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 470 transitions. [2022-03-15 21:36:06,262 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 470 transitions. Word has length 20 [2022-03-15 21:36:06,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:06,262 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 470 transitions. [2022-03-15 21:36:06,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 21:36:06,262 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 470 transitions. [2022-03-15 21:36:06,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:36:06,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:06,263 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:06,280 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 21:36:06,475 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 21:36:06,475 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:06,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:06,476 INFO L85 PathProgramCache]: Analyzing trace with hash -342337940, now seen corresponding path program 47 times [2022-03-15 21:36:06,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:06,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430829148] [2022-03-15 21:36:06,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:06,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:06,627 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 21:36:06,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:06,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430829148] [2022-03-15 21:36:06,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430829148] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:06,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213190709] [2022-03-15 21:36:06,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:36:06,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:06,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:06,629 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 21:36:06,630 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 21:36:06,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:36:06,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:06,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:36:06,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:06,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:06,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 21:36:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:06,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:06,825 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:36:06,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:36:06,857 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:06,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213190709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:06,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:06,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 19 [2022-03-15 21:36:06,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [834162644] [2022-03-15 21:36:06,858 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:06,859 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:06,862 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 48 transitions. [2022-03-15 21:36:06,862 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:06,978 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:36:06,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:36:06,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:06,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:36:06,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:36:06,979 INFO L87 Difference]: Start difference. First operand 195 states and 470 transitions. Second operand has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 21:36:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:08,063 INFO L93 Difference]: Finished difference Result 780 states and 1678 transitions. [2022-03-15 21:36:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-15 21:36:08,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 21:36:08,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:08,066 INFO L225 Difference]: With dead ends: 780 [2022-03-15 21:36:08,066 INFO L226 Difference]: Without dead ends: 780 [2022-03-15 21:36:08,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=625, Invalid=4631, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:36:08,067 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 85 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:08,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 19 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:08,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-03-15 21:36:08,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 235. [2022-03-15 21:36:08,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.4444444444444446) internal successors, (572), 234 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:08,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 572 transitions. [2022-03-15 21:36:08,072 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 572 transitions. Word has length 20 [2022-03-15 21:36:08,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:08,073 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 572 transitions. [2022-03-15 21:36:08,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 12 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 21:36:08,073 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 572 transitions. [2022-03-15 21:36:08,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:36:08,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:08,073 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:08,095 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 21:36:08,290 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 21:36:08,290 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:08,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1939569412, now seen corresponding path program 48 times [2022-03-15 21:36:08,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:08,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473958985] [2022-03-15 21:36:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:08,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:08,396 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 21:36:08,396 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:08,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473958985] [2022-03-15 21:36:08,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473958985] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:08,396 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24285779] [2022-03-15 21:36:08,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:36:08,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:08,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:08,398 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 21:36:08,398 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 21:36:08,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:36:08,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:08,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:36:08,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:08,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:08,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 21:36:08,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:08,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:08,639 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:36:08,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:36:08,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:08,670 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24285779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:08,670 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:08,670 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 21 [2022-03-15 21:36:08,670 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [609585174] [2022-03-15 21:36:08,671 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:08,672 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:08,675 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 50 transitions. [2022-03-15 21:36:08,675 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:08,808 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:36:08,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:36:08,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:08,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:36:08,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:36:08,808 INFO L87 Difference]: Start difference. First operand 235 states and 572 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 21:36:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:09,968 INFO L93 Difference]: Finished difference Result 709 states and 1444 transitions. [2022-03-15 21:36:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-15 21:36:09,969 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 20 [2022-03-15 21:36:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:09,971 INFO L225 Difference]: With dead ends: 709 [2022-03-15 21:36:09,971 INFO L226 Difference]: Without dead ends: 709 [2022-03-15 21:36:09,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=5261, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:36:09,972 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 49 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:09,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 21 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 864 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:09,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-03-15 21:36:09,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 122. [2022-03-15 21:36:09,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.1322314049586777) internal successors, (258), 121 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 258 transitions. [2022-03-15 21:36:09,975 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 258 transitions. Word has length 20 [2022-03-15 21:36:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:09,976 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 258 transitions. [2022-03-15 21:36:09,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 21:36:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 258 transitions. [2022-03-15 21:36:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:36:09,976 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:09,976 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:09,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-15 21:36:10,191 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 21:36:10,191 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:10,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:10,192 INFO L85 PathProgramCache]: Analyzing trace with hash -335746708, now seen corresponding path program 49 times [2022-03-15 21:36:10,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:10,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872872878] [2022-03-15 21:36:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:10,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:10,300 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 21:36:10,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:10,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872872878] [2022-03-15 21:36:10,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872872878] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:10,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863878548] [2022-03-15 21:36:10,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:36:10,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:10,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:10,301 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 21:36:10,302 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 21:36:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:10,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 21:36:10,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:10,445 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 21:36:10,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:10,495 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:36:10,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:36:10,525 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 21:36:10,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863878548] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:10,526 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:10,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-03-15 21:36:10,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [748593287] [2022-03-15 21:36:10,526 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:10,527 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:10,531 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 62 transitions. [2022-03-15 21:36:10,531 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:10,688 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:36:10,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:36:10,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:10,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:36:10,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:36:10,689 INFO L87 Difference]: Start difference. First operand 122 states and 258 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 21:36:11,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:11,068 INFO L93 Difference]: Finished difference Result 369 states and 769 transitions. [2022-03-15 21:36:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:36:11,069 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 21:36:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:11,070 INFO L225 Difference]: With dead ends: 369 [2022-03-15 21:36:11,070 INFO L226 Difference]: Without dead ends: 369 [2022-03-15 21:36:11,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=256, Invalid=1550, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:36:11,071 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 71 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:11,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 15 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:36:11,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-03-15 21:36:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 136. [2022-03-15 21:36:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1481481481481484) internal successors, (290), 135 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:11,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 290 transitions. [2022-03-15 21:36:11,073 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 290 transitions. Word has length 20 [2022-03-15 21:36:11,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:11,074 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 290 transitions. [2022-03-15 21:36:11,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 21:36:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 290 transitions. [2022-03-15 21:36:11,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:11,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:11,074 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:11,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:11,290 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 21:36:11,290 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:11,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1606987248, now seen corresponding path program 50 times [2022-03-15 21:36:11,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:11,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844764745] [2022-03-15 21:36:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:11,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:11,505 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:11,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:11,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844764745] [2022-03-15 21:36:11,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844764745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:11,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402629130] [2022-03-15 21:36:11,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:36:11,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:11,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:11,507 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 21:36:11,531 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 21:36:11,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:36:11,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:11,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-15 21:36:11,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:11,972 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-03-15 21:36:11,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2022-03-15 21:36:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:12,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:12,612 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:36:12,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 284 [2022-03-15 21:36:13,021 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:13,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402629130] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:13,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:13,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 15] total 34 [2022-03-15 21:36:13,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [29747297] [2022-03-15 21:36:13,022 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:13,023 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:13,026 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 47 transitions. [2022-03-15 21:36:13,026 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:13,425 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [25986#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 25987#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 25985#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 25988#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 25989#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:36:13,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:36:13,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:13,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:36:13,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 21:36:13,426 INFO L87 Difference]: Start difference. First operand 136 states and 290 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 21:36:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:14,030 INFO L93 Difference]: Finished difference Result 167 states and 341 transitions. [2022-03-15 21:36:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 21:36:14,030 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 21 [2022-03-15 21:36:14,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:14,030 INFO L225 Difference]: With dead ends: 167 [2022-03-15 21:36:14,031 INFO L226 Difference]: Without dead ends: 158 [2022-03-15 21:36:14,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=244, Invalid=2726, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:36:14,031 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:14,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:36:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-15 21:36:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2022-03-15 21:36:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1470588235294117) internal successors, (292), 136 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 292 transitions. [2022-03-15 21:36:14,033 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 292 transitions. Word has length 21 [2022-03-15 21:36:14,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:14,033 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 292 transitions. [2022-03-15 21:36:14,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 21:36:14,033 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 292 transitions. [2022-03-15 21:36:14,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:14,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:14,034 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:14,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-15 21:36:14,234 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 21:36:14,234 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:14,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:14,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1274992918, now seen corresponding path program 51 times [2022-03-15 21:36:14,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:14,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534495969] [2022-03-15 21:36:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:14,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:14,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:14,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534495969] [2022-03-15 21:36:14,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534495969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:14,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071087581] [2022-03-15 21:36:14,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:36:14,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:14,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:14,455 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 21:36:14,456 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 21:36:14,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:36:14,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:14,487 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-15 21:36:14,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:14,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:14,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:14,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 42 [2022-03-15 21:36:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:15,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:15,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:15,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:15,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 202 [2022-03-15 21:36:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:15,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071087581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:15,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:15,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16, 16] total 39 [2022-03-15 21:36:15,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1730460223] [2022-03-15 21:36:15,991 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:15,993 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:15,996 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 45 transitions. [2022-03-15 21:36:15,996 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:16,369 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [26621#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 26624#(and (<= 0 s) (= q_back q_front) (<= s 0)), 26622#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 26620#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 26623#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:36:16,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 21:36:16,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:16,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 21:36:16,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:36:16,369 INFO L87 Difference]: Start difference. First operand 137 states and 292 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 21:36:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:16,978 INFO L93 Difference]: Finished difference Result 168 states and 341 transitions. [2022-03-15 21:36:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:36:16,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 21:36:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:16,979 INFO L225 Difference]: With dead ends: 168 [2022-03-15 21:36:16,979 INFO L226 Difference]: Without dead ends: 161 [2022-03-15 21:36:16,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:36:16,979 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:16,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:36:16,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-15 21:36:16,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 136. [2022-03-15 21:36:16,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1481481481481484) internal successors, (290), 135 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:16,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 290 transitions. [2022-03-15 21:36:16,981 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 290 transitions. Word has length 21 [2022-03-15 21:36:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:16,981 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 290 transitions. [2022-03-15 21:36:16,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 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 21:36:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 290 transitions. [2022-03-15 21:36:16,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:16,982 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:16,982 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:16,998 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 21:36:17,187 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 21:36:17,187 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:17,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash -9356680, now seen corresponding path program 52 times [2022-03-15 21:36:17,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:17,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764862786] [2022-03-15 21:36:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:17,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:17,428 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:17,428 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:17,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764862786] [2022-03-15 21:36:17,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764862786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:17,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723734253] [2022-03-15 21:36:17,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:36:17,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:17,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:17,429 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 21:36:17,432 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 21:36:17,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:36:17,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:17,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 21:36:17,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:17,865 INFO L353 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2022-03-15 21:36:17,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 32 [2022-03-15 21:36:17,939 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:17,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:18,507 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:36:18,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 284 [2022-03-15 21:36:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:18,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723734253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:18,953 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:18,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 35 [2022-03-15 21:36:18,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1518977660] [2022-03-15 21:36:18,953 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:18,954 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:18,958 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 49 transitions. [2022-03-15 21:36:18,958 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:19,377 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [27252#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 27254#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 27255#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 27253#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 27256#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:36:19,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:36:19,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:19,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:36:19,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:36:19,378 INFO L87 Difference]: Start difference. First operand 136 states and 290 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 21:36:20,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:20,029 INFO L93 Difference]: Finished difference Result 169 states and 344 transitions. [2022-03-15 21:36:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 21:36:20,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 21 [2022-03-15 21:36:20,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:20,030 INFO L225 Difference]: With dead ends: 169 [2022-03-15 21:36:20,030 INFO L226 Difference]: Without dead ends: 158 [2022-03-15 21:36:20,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=247, Invalid=2945, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:36:20,031 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:20,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 11 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:20,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-03-15 21:36:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2022-03-15 21:36:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1470588235294117) internal successors, (292), 136 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 292 transitions. [2022-03-15 21:36:20,038 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 292 transitions. Word has length 21 [2022-03-15 21:36:20,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:20,038 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 292 transitions. [2022-03-15 21:36:20,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 21:36:20,038 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 292 transitions. [2022-03-15 21:36:20,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:20,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:20,038 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:20,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:20,251 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 21:36:20,251 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:20,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:20,252 INFO L85 PathProgramCache]: Analyzing trace with hash -862284750, now seen corresponding path program 53 times [2022-03-15 21:36:20,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:20,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852171240] [2022-03-15 21:36:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:20,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:20,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:20,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:20,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852171240] [2022-03-15 21:36:20,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852171240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:20,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274934931] [2022-03-15 21:36:20,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:36:20,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:20,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:20,507 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 21:36:20,535 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 21:36:20,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:36:20,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:20,547 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 72 conjunts are in the unsatisfiable core [2022-03-15 21:36:20,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:20,999 INFO L353 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2022-03-15 21:36:20,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 32 [2022-03-15 21:36:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:21,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:21,691 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:36:21,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 105 treesize of output 287 [2022-03-15 21:36:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:22,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274934931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:22,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:22,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 35 [2022-03-15 21:36:22,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1600336304] [2022-03-15 21:36:22,015 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:22,016 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:22,020 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 47 transitions. [2022-03-15 21:36:22,020 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:22,423 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [27891#(and (<= 0 s) (= q_back q_front) (<= s 0)), 27889#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 27890#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 27887#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 27888#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:36:22,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:36:22,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:36:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:36:22,424 INFO L87 Difference]: Start difference. First operand 137 states and 292 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 21:36:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:23,125 INFO L93 Difference]: Finished difference Result 171 states and 349 transitions. [2022-03-15 21:36:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:36:23,125 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 21 [2022-03-15 21:36:23,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:23,126 INFO L225 Difference]: With dead ends: 171 [2022-03-15 21:36:23,126 INFO L226 Difference]: Without dead ends: 162 [2022-03-15 21:36:23,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=266, Invalid=3040, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:36:23,126 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:23,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 9 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:23,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-03-15 21:36:23,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 138. [2022-03-15 21:36:23,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.145985401459854) internal successors, (294), 137 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 21:36:23,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 294 transitions. [2022-03-15 21:36:23,128 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 294 transitions. Word has length 21 [2022-03-15 21:36:23,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:23,129 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 294 transitions. [2022-03-15 21:36:23,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 21:36:23,129 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 294 transitions. [2022-03-15 21:36:23,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:23,129 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:23,129 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:23,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:23,346 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 21:36:23,346 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:23,346 INFO L85 PathProgramCache]: Analyzing trace with hash 2019695416, now seen corresponding path program 54 times [2022-03-15 21:36:23,347 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:23,347 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206401818] [2022-03-15 21:36:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:23,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:23,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:23,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206401818] [2022-03-15 21:36:23,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206401818] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:23,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867196160] [2022-03-15 21:36:23,595 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:36:23,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:23,596 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 21:36:23,596 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 21:36:23,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:36:23,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:23,623 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-15 21:36:23,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:24,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:24,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:24,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 42 [2022-03-15 21:36:24,190 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:24,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:24,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:24,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:24,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 202 [2022-03-15 21:36:25,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:25,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867196160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:25,286 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:25,286 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2022-03-15 21:36:25,286 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2107421586] [2022-03-15 21:36:25,286 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:25,287 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:25,290 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 45 transitions. [2022-03-15 21:36:25,290 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:25,661 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [28536#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1)), 28537#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 28539#(and (<= 0 s) (= q_back q_front) (<= s 0)), 28540#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 28538#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:36:25,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:36:25,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:25,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:36:25,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=2110, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:36:25,662 INFO L87 Difference]: Start difference. First operand 138 states and 294 transitions. Second operand has 22 states, 21 states have (on average 1.7619047619047619) 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 21:36:26,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:26,637 INFO L93 Difference]: Finished difference Result 192 states and 396 transitions. [2022-03-15 21:36:26,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:36:26,638 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.7619047619047619) 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 21 [2022-03-15 21:36:26,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:26,638 INFO L225 Difference]: With dead ends: 192 [2022-03-15 21:36:26,638 INFO L226 Difference]: Without dead ends: 185 [2022-03-15 21:36:26,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 15 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=634, Invalid=4622, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:36:26,639 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:26,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:26,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-15 21:36:26,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 151. [2022-03-15 21:36:26,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1733333333333333) internal successors, (326), 150 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:26,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 326 transitions. [2022-03-15 21:36:26,641 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 326 transitions. Word has length 21 [2022-03-15 21:36:26,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:26,641 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 326 transitions. [2022-03-15 21:36:26,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.7619047619047619) 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 21:36:26,641 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 326 transitions. [2022-03-15 21:36:26,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:26,642 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:26,642 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:26,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:26,848 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 21:36:26,848 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:26,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2022416624, now seen corresponding path program 55 times [2022-03-15 21:36:26,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:26,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358235187] [2022-03-15 21:36:26,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:26,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:27,081 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:27,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:27,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358235187] [2022-03-15 21:36:27,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358235187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:27,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310339369] [2022-03-15 21:36:27,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:36:27,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:27,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:27,082 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 21:36:27,099 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 21:36:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:27,118 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 21:36:27,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:27,516 INFO L353 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2022-03-15 21:36:27,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 32 [2022-03-15 21:36:27,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:27,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:28,157 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:36:28,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 284 [2022-03-15 21:36:28,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:28,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310339369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:28,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:28,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-03-15 21:36:28,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1526060025] [2022-03-15 21:36:28,549 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:28,550 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:28,554 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 51 transitions. [2022-03-15 21:36:28,554 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:29,009 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [29242#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 29243#(and (<= 0 s) (= q_back q_front) (<= s 0)), 29240#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 29239#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 29241#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:36:29,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:36:29,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:36:29,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1671, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:36:29,010 INFO L87 Difference]: Start difference. First operand 151 states and 326 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 21:36:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:29,783 INFO L93 Difference]: Finished difference Result 185 states and 381 transitions. [2022-03-15 21:36:29,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:36:29,784 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 21 [2022-03-15 21:36:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:29,784 INFO L225 Difference]: With dead ends: 185 [2022-03-15 21:36:29,784 INFO L226 Difference]: Without dead ends: 172 [2022-03-15 21:36:29,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 906 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=250, Invalid=3172, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:36:29,785 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:29,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 13 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:29,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-15 21:36:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 152. [2022-03-15 21:36:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.165562913907285) internal successors, (327), 151 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:29,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 327 transitions. [2022-03-15 21:36:29,787 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 327 transitions. Word has length 21 [2022-03-15 21:36:29,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:29,787 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 327 transitions. [2022-03-15 21:36:29,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 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 21:36:29,787 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 327 transitions. [2022-03-15 21:36:29,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:29,787 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:29,787 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:29,803 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 21:36:30,003 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 21:36:30,003 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:30,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:30,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1601584278, now seen corresponding path program 56 times [2022-03-15 21:36:30,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:30,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324665888] [2022-03-15 21:36:30,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:30,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:30,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:30,224 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:30,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:30,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324665888] [2022-03-15 21:36:30,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324665888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:30,225 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904709041] [2022-03-15 21:36:30,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:36:30,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:30,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:30,226 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 21:36:30,226 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 21:36:30,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:36:30,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:30,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-15 21:36:30,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:30,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:30,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:30,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 47 [2022-03-15 21:36:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:30,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:31,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:31,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:31,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 205 [2022-03-15 21:36:31,868 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:31,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904709041] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:31,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:31,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 41 [2022-03-15 21:36:31,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [298916127] [2022-03-15 21:36:31,869 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:31,870 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:31,873 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 49 transitions. [2022-03-15 21:36:31,873 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:32,302 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [29929#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 29928#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 29930#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 29931#(and (<= 0 s) (= q_back q_front) (<= s 0)), 29932#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:36:32,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:36:32,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:32,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:36:32,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:36:32,302 INFO L87 Difference]: Start difference. First operand 152 states and 327 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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 21:36:33,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:33,067 INFO L93 Difference]: Finished difference Result 186 states and 383 transitions. [2022-03-15 21:36:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:36:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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 21 [2022-03-15 21:36:33,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:33,076 INFO L225 Difference]: With dead ends: 186 [2022-03-15 21:36:33,076 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 21:36:33,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=523, Invalid=3637, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:36:33,077 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:33,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 10 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:33,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 21:36:33,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 153. [2022-03-15 21:36:33,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.1578947368421053) internal successors, (328), 152 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:33,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 328 transitions. [2022-03-15 21:36:33,079 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 328 transitions. Word has length 21 [2022-03-15 21:36:33,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:33,079 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 328 transitions. [2022-03-15 21:36:33,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 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 21:36:33,079 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 328 transitions. [2022-03-15 21:36:33,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:33,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:33,079 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:33,095 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 21:36:33,280 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 21:36:33,280 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:33,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:33,280 INFO L85 PathProgramCache]: Analyzing trace with hash 748656208, now seen corresponding path program 57 times [2022-03-15 21:36:33,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:33,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055845650] [2022-03-15 21:36:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:33,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:33,511 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:33,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055845650] [2022-03-15 21:36:33,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055845650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:33,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461983361] [2022-03-15 21:36:33,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:36:33,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:33,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:33,512 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 21:36:33,513 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 21:36:33,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:36:33,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:33,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-15 21:36:33,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:34,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:34,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:34,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 55 [2022-03-15 21:36:34,144 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:34,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:34,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:34,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:34,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 205 [2022-03-15 21:36:35,315 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:35,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461983361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:35,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:35,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 41 [2022-03-15 21:36:35,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1012340207] [2022-03-15 21:36:35,315 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:35,316 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:35,320 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 47 transitions. [2022-03-15 21:36:35,320 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:35,726 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [30626#(and (<= 0 s) (= q_back q_front) (<= s 0)), 30625#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 30622#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 30623#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 30624#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:36:35,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:36:35,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:35,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:36:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:36:35,727 INFO L87 Difference]: Start difference. First operand 153 states and 328 transitions. Second operand has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 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 21:36:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:36,566 INFO L93 Difference]: Finished difference Result 187 states and 385 transitions. [2022-03-15 21:36:36,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:36:36,566 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 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 21 [2022-03-15 21:36:36,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:36,567 INFO L225 Difference]: With dead ends: 187 [2022-03-15 21:36:36,567 INFO L226 Difference]: Without dead ends: 178 [2022-03-15 21:36:36,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=548, Invalid=3742, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:36:36,568 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:36,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:36,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-03-15 21:36:36,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 152. [2022-03-15 21:36:36,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.152317880794702) internal successors, (325), 151 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 325 transitions. [2022-03-15 21:36:36,570 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 325 transitions. Word has length 21 [2022-03-15 21:36:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:36,570 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 325 transitions. [2022-03-15 21:36:36,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0) internal successors, (38), 19 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 21:36:36,570 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 325 transitions. [2022-03-15 21:36:36,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:36,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:36,571 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:36,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:36,788 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 21:36:36,788 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:36,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:36,789 INFO L85 PathProgramCache]: Analyzing trace with hash -664330922, now seen corresponding path program 58 times [2022-03-15 21:36:36,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:36,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258718921] [2022-03-15 21:36:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:36,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:37,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:37,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258718921] [2022-03-15 21:36:37,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258718921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:37,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323936897] [2022-03-15 21:36:37,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:36:37,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:37,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:37,076 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 21:36:37,078 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 21:36:37,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:36:37,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:37,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 21:36:37,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:37,533 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-03-15 21:36:37,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 32 [2022-03-15 21:36:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:37,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:38,215 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:36:38,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 284 [2022-03-15 21:36:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:38,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323936897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:38,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:38,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-03-15 21:36:38,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1161378539] [2022-03-15 21:36:38,523 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:38,525 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:38,528 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 45 transitions. [2022-03-15 21:36:38,528 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:38,894 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [31313#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 31312#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 31314#(and (<= 0 s) (= q_back q_front) (<= s 0)), 31315#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 31316#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:36:38,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:36:38,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:38,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:36:38,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1672, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 21:36:38,894 INFO L87 Difference]: Start difference. First operand 152 states and 325 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) 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 21:36:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:39,735 INFO L93 Difference]: Finished difference Result 188 states and 383 transitions. [2022-03-15 21:36:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:36:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) 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 21 [2022-03-15 21:36:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:39,736 INFO L225 Difference]: With dead ends: 188 [2022-03-15 21:36:39,736 INFO L226 Difference]: Without dead ends: 181 [2022-03-15 21:36:39,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=288, Invalid=3494, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:36:39,737 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:39,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-15 21:36:39,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 136. [2022-03-15 21:36:39,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1481481481481484) internal successors, (290), 135 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:39,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 290 transitions. [2022-03-15 21:36:39,739 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 290 transitions. Word has length 21 [2022-03-15 21:36:39,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:39,739 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 290 transitions. [2022-03-15 21:36:39,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) 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 21:36:39,739 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 290 transitions. [2022-03-15 21:36:39,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:39,739 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:39,739 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:39,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-15 21:36:39,955 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 21:36:39,955 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:39,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2765448, now seen corresponding path program 59 times [2022-03-15 21:36:39,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:39,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709295609] [2022-03-15 21:36:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:39,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:39,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:40,209 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:40,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:40,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709295609] [2022-03-15 21:36:40,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709295609] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:40,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60660736] [2022-03-15 21:36:40,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:36:40,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:40,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:40,210 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 21:36:40,211 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 21:36:40,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:36:40,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:40,242 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-15 21:36:40,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:40,690 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-03-15 21:36:40,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 32 [2022-03-15 21:36:40,772 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:40,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:41,463 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:36:41,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 112 treesize of output 290 [2022-03-15 21:36:41,839 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:41,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60660736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:41,839 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:41,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 39 [2022-03-15 21:36:41,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [493937084] [2022-03-15 21:36:41,839 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:41,841 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:41,844 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 53 transitions. [2022-03-15 21:36:41,844 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:42,344 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [31979#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 31977#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 31980#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 31976#(and (<= 0 s) (= q_back q_front) (<= s 0)), 31978#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:36:42,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:36:42,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:36:42,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1923, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:36:42,345 INFO L87 Difference]: Start difference. First operand 136 states and 290 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 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 21:36:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:43,130 INFO L93 Difference]: Finished difference Result 169 states and 342 transitions. [2022-03-15 21:36:43,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:36:43,130 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 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 21 [2022-03-15 21:36:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:43,131 INFO L225 Difference]: With dead ends: 169 [2022-03-15 21:36:43,131 INFO L226 Difference]: Without dead ends: 154 [2022-03-15 21:36:43,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=256, Invalid=3526, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:36:43,132 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 850 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:43,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 14 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 850 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-15 21:36:43,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2022-03-15 21:36:43,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.140740740740741) internal successors, (289), 135 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 289 transitions. [2022-03-15 21:36:43,134 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 289 transitions. Word has length 21 [2022-03-15 21:36:43,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:43,134 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 289 transitions. [2022-03-15 21:36:43,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 20 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 21:36:43,134 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 289 transitions. [2022-03-15 21:36:43,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:43,134 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:43,134 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:43,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-15 21:36:43,335 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 21:36:43,335 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:43,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:43,336 INFO L85 PathProgramCache]: Analyzing trace with hash 672112818, now seen corresponding path program 60 times [2022-03-15 21:36:43,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:43,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644128773] [2022-03-15 21:36:43,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:43,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:43,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:43,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:43,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644128773] [2022-03-15 21:36:43,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644128773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:43,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690044717] [2022-03-15 21:36:43,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:36:43,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:43,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:43,593 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 21:36:43,594 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 21:36:43,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:36:43,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:43,633 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-15 21:36:43,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:44,058 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-03-15 21:36:44,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 32 [2022-03-15 21:36:44,136 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:44,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:44,727 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:36:44,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 284 [2022-03-15 21:36:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:45,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690044717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:45,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:45,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-03-15 21:36:45,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [760164585] [2022-03-15 21:36:45,094 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:45,096 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:45,099 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 51 transitions. [2022-03-15 21:36:45,099 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:45,577 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [32613#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 32615#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 32617#(and (<= 0 s) (= q_back q_front) (<= s 0)), 32614#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 32616#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:36:45,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:36:45,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:45,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:36:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:36:45,581 INFO L87 Difference]: Start difference. First operand 136 states and 289 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 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 21:36:46,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:46,365 INFO L93 Difference]: Finished difference Result 167 states and 339 transitions. [2022-03-15 21:36:46,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:36:46,365 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 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 21 [2022-03-15 21:36:46,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:46,365 INFO L225 Difference]: With dead ends: 167 [2022-03-15 21:36:46,365 INFO L226 Difference]: Without dead ends: 154 [2022-03-15 21:36:46,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=260, Invalid=3400, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:36:46,366 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:46,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:46,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-15 21:36:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 136. [2022-03-15 21:36:46,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1333333333333333) internal successors, (288), 135 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:46,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 288 transitions. [2022-03-15 21:36:46,368 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 288 transitions. Word has length 21 [2022-03-15 21:36:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:46,368 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 288 transitions. [2022-03-15 21:36:46,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 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 21:36:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 288 transitions. [2022-03-15 21:36:46,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:46,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:46,369 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:46,384 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 21:36:46,579 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 21:36:46,579 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:46,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1146424, now seen corresponding path program 61 times [2022-03-15 21:36:46,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:46,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900991940] [2022-03-15 21:36:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:46,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:46,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:46,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900991940] [2022-03-15 21:36:46,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900991940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:46,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586588358] [2022-03-15 21:36:46,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:36:46,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:46,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:46,861 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 21:36:46,861 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 21:36:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:46,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 21:36:46,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:47,321 INFO L353 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2022-03-15 21:36:47,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 32 [2022-03-15 21:36:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:47,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:47,999 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:36:47,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 284 [2022-03-15 21:36:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:48,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586588358] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:48,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:48,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-03-15 21:36:48,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1869519304] [2022-03-15 21:36:48,298 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:48,299 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:48,303 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 49 transitions. [2022-03-15 21:36:48,303 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:48,717 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [33252#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 33254#(and (<= 0 s) (= q_back q_front) (<= s 0)), 33250#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 33253#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 33251#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:36:48,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:36:48,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:48,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:36:48,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1757, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 21:36:48,717 INFO L87 Difference]: Start difference. First operand 136 states and 288 transitions. Second operand has 21 states, 20 states have (on average 1.95) 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 21:36:49,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:49,525 INFO L93 Difference]: Finished difference Result 166 states and 338 transitions. [2022-03-15 21:36:49,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:36:49,526 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) 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 21 [2022-03-15 21:36:49,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:49,526 INFO L225 Difference]: With dead ends: 166 [2022-03-15 21:36:49,526 INFO L226 Difference]: Without dead ends: 155 [2022-03-15 21:36:49,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=275, Invalid=3507, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:36:49,527 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:49,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 11 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:49,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-15 21:36:49,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 136. [2022-03-15 21:36:49,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1259259259259258) internal successors, (287), 135 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:49,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 287 transitions. [2022-03-15 21:36:49,529 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 287 transitions. Word has length 21 [2022-03-15 21:36:49,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:49,529 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 287 transitions. [2022-03-15 21:36:49,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) 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 21:36:49,529 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 287 transitions. [2022-03-15 21:36:49,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:49,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:49,529 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:49,545 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 21:36:49,731 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 21:36:49,731 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash -851781646, now seen corresponding path program 62 times [2022-03-15 21:36:49,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:49,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237086135] [2022-03-15 21:36:49,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:49,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:49,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:49,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:49,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237086135] [2022-03-15 21:36:49,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237086135] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:49,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452755782] [2022-03-15 21:36:49,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:36:49,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:49,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:49,995 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 21:36:49,996 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 21:36:50,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:36:50,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:50,024 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-15 21:36:50,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:50,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:50,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 47 [2022-03-15 21:36:50,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:50,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:51,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:51,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:51,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 205 [2022-03-15 21:36:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:51,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452755782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:51,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:51,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 42 [2022-03-15 21:36:51,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1075636004] [2022-03-15 21:36:51,666 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:51,668 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:51,671 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 47 transitions. [2022-03-15 21:36:51,671 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:52,090 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [33894#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 33897#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 33893#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 33896#(and (<= 0 s) (= q_back q_front) (<= s 0)), 33895#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:36:52,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:36:52,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:52,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:36:52,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:36:52,091 INFO L87 Difference]: Start difference. First operand 136 states and 287 transitions. Second operand has 21 states, 20 states have (on average 1.9) 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 21:36:52,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:52,927 INFO L93 Difference]: Finished difference Result 165 states and 337 transitions. [2022-03-15 21:36:52,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:36:52,928 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) 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 21 [2022-03-15 21:36:52,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:52,928 INFO L225 Difference]: With dead ends: 165 [2022-03-15 21:36:52,928 INFO L226 Difference]: Without dead ends: 156 [2022-03-15 21:36:52,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1163 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=569, Invalid=3987, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:36:52,929 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:52,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 8 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-15 21:36:52,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 136. [2022-03-15 21:36:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.1185185185185187) internal successors, (286), 135 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 286 transitions. [2022-03-15 21:36:52,931 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 286 transitions. Word has length 21 [2022-03-15 21:36:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:52,931 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 286 transitions. [2022-03-15 21:36:52,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) 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 21:36:52,931 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 286 transitions. [2022-03-15 21:36:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:52,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:52,932 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:52,948 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 21:36:53,147 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 21:36:53,147 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:53,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:53,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2030198520, now seen corresponding path program 63 times [2022-03-15 21:36:53,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:53,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137824675] [2022-03-15 21:36:53,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:53,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:53,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:53,418 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:36:53,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:53,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137824675] [2022-03-15 21:36:53,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137824675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:53,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001274479] [2022-03-15 21:36:53,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:36:53,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:53,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:53,428 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 21:36:53,429 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 21:36:53,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:36:53,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:53,456 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-15 21:36:53,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:53,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:36:53,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:53,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 42 [2022-03-15 21:36:54,055 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:54,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:54,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:36:54,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:36:54,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 94 treesize of output 202 [2022-03-15 21:36:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:55,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001274479] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:55,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:55,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 42 [2022-03-15 21:36:55,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [447583672] [2022-03-15 21:36:55,082 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:55,084 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:55,092 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 45 transitions. [2022-03-15 21:36:55,092 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:55,474 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [34541#(and (<= 0 s) (= q_back q_front) (<= s 0)), 34537#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 34539#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 34538#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 34540#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:36:55,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:36:55,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:36:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2042, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:36:55,475 INFO L87 Difference]: Start difference. First operand 136 states and 286 transitions. Second operand has 21 states, 20 states have (on average 1.85) 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 21:36:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:36:56,369 INFO L93 Difference]: Finished difference Result 164 states and 333 transitions. [2022-03-15 21:36:56,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:36:56,369 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) 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 21 [2022-03-15 21:36:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:36:56,370 INFO L225 Difference]: With dead ends: 164 [2022-03-15 21:36:56,370 INFO L226 Difference]: Without dead ends: 157 [2022-03-15 21:36:56,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1187 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=577, Invalid=4115, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:36:56,370 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:36:56,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:36:56,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-15 21:36:56,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 127. [2022-03-15 21:36:56,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.134920634920635) internal successors, (269), 126 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:36:56,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 269 transitions. [2022-03-15 21:36:56,372 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 269 transitions. Word has length 21 [2022-03-15 21:36:56,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:36:56,372 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 269 transitions. [2022-03-15 21:36:56,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) 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 21:36:56,372 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 269 transitions. [2022-03-15 21:36:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:36:56,373 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:36:56,373 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:36:56,388 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 21:36:56,573 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 21:36:56,573 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:36:56,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:36:56,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1818088432, now seen corresponding path program 64 times [2022-03-15 21:36:56,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:36:56,574 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528093113] [2022-03-15 21:36:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:36:56,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:36:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:36:56,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:56,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:36:56,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528093113] [2022-03-15 21:36:56,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528093113] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:36:56,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151724550] [2022-03-15 21:36:56,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:36:56,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:36:56,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:36:56,888 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 21:36:56,889 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 21:36:56,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:36:56,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:36:56,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 21:36:56,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:36:57,346 INFO L353 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2022-03-15 21:36:57,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 32 [2022-03-15 21:36:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:57,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:36:58,031 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:36:58,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 284 [2022-03-15 21:36:58,444 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:36:58,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151724550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:36:58,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:36:58,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 21:36:58,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [402309145] [2022-03-15 21:36:58,445 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:36:58,446 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:36:58,450 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 65 transitions. [2022-03-15 21:36:58,450 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:36:59,209 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [35162#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 35163#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 35160#(and (<= 5 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= N 5) (= (select q (+ 3 q_front)) 1) (= (select q (+ 2 q_front)) 1)), 35166#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 35165#(and (<= 0 s) (= q_back q_front) (<= s 0)), 35161#(and (<= 5 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1)), 35164#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:36:59,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:36:59,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:36:59,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:36:59,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2021, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 21:36:59,210 INFO L87 Difference]: Start difference. First operand 127 states and 269 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 21:37:00,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:00,228 INFO L93 Difference]: Finished difference Result 178 states and 357 transitions. [2022-03-15 21:37:00,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:37:00,229 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 21 [2022-03-15 21:37:00,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:00,229 INFO L225 Difference]: With dead ends: 178 [2022-03-15 21:37:00,229 INFO L226 Difference]: Without dead ends: 175 [2022-03-15 21:37:00,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=273, Invalid=4149, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:37:00,230 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:00,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 1185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:00,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-15 21:37:00,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 133. [2022-03-15 21:37:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1136363636363638) internal successors, (279), 132 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:00,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 279 transitions. [2022-03-15 21:37:00,232 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 279 transitions. Word has length 21 [2022-03-15 21:37:00,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:00,232 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 279 transitions. [2022-03-15 21:37:00,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 21:37:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 279 transitions. [2022-03-15 21:37:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:37:00,232 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:00,232 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:00,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:00,432 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 21:37:00,433 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:00,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1923268630, now seen corresponding path program 65 times [2022-03-15 21:37:00,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:00,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977779580] [2022-03-15 21:37:00,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:00,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:00,712 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:00,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:00,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977779580] [2022-03-15 21:37:00,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977779580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:00,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462356603] [2022-03-15 21:37:00,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:37:00,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:00,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:00,713 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 21:37:00,714 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 21:37:00,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:37:00,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:00,749 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-15 21:37:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:01,187 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-03-15 21:37:01,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 32 [2022-03-15 21:37:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:01,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:01,909 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:37:01,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 284 [2022-03-15 21:37:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:02,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462356603] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:02,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:02,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 21:37:02,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [115748271] [2022-03-15 21:37:02,262 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:02,264 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:02,267 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 57 transitions. [2022-03-15 21:37:02,267 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:02,841 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [35811#(and (<= 5 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1)), 35816#(and (<= 0 s) (= q_back q_front) (<= s 0)), 35813#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 35815#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 35814#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 35812#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:37:02,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:37:02,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:02,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:37:02,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:37:02,842 INFO L87 Difference]: Start difference. First operand 133 states and 279 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 22 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 21:37:03,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:03,799 INFO L93 Difference]: Finished difference Result 188 states and 378 transitions. [2022-03-15 21:37:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:37:03,799 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 22 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 21 [2022-03-15 21:37:03,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:03,800 INFO L225 Difference]: With dead ends: 188 [2022-03-15 21:37:03,800 INFO L226 Difference]: Without dead ends: 163 [2022-03-15 21:37:03,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=264, Invalid=3896, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:37:03,801 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:03,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 15 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:03,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-15 21:37:03,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 132. [2022-03-15 21:37:03,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.114503816793893) internal successors, (277), 131 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:03,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 277 transitions. [2022-03-15 21:37:03,809 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 277 transitions. Word has length 21 [2022-03-15 21:37:03,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:03,809 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 277 transitions. [2022-03-15 21:37:03,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 22 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 21:37:03,809 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 277 transitions. [2022-03-15 21:37:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:37:03,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:03,809 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:03,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:04,010 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 21:37:04,010 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:04,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:04,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1696820400, now seen corresponding path program 66 times [2022-03-15 21:37:04,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:04,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673240458] [2022-03-15 21:37:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:04,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:04,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:04,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:04,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673240458] [2022-03-15 21:37:04,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673240458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:04,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530122410] [2022-03-15 21:37:04,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:37:04,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:04,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:04,271 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 21:37:04,271 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 21:37:04,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:37:04,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:04,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-15 21:37:04,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:04,733 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-03-15 21:37:04,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 32 [2022-03-15 21:37:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:04,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:05,431 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:37:05,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 284 [2022-03-15 21:37:05,745 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:05,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530122410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:05,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:05,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 21:37:05,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1543285369] [2022-03-15 21:37:05,746 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:05,747 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:05,751 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 55 transitions. [2022-03-15 21:37:05,751 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:06,318 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [36472#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 36470#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 36467#(and (<= 5 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1)), 36471#(and (<= 0 s) (= q_back q_front) (<= s 0)), 36469#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 36468#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:37:06,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:37:06,318 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:37:06,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:37:06,319 INFO L87 Difference]: Start difference. First operand 132 states and 277 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) 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 21:37:07,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:07,422 INFO L93 Difference]: Finished difference Result 200 states and 404 transitions. [2022-03-15 21:37:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:37:07,422 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) 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 21 [2022-03-15 21:37:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:07,423 INFO L225 Difference]: With dead ends: 200 [2022-03-15 21:37:07,423 INFO L226 Difference]: Without dead ends: 179 [2022-03-15 21:37:07,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=286, Invalid=4136, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:37:07,423 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 1039 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:07,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 12 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1039 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:07,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-15 21:37:07,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2022-03-15 21:37:07,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1153846153846154) internal successors, (275), 130 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 275 transitions. [2022-03-15 21:37:07,425 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 275 transitions. Word has length 21 [2022-03-15 21:37:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:07,425 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 275 transitions. [2022-03-15 21:37:07,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) 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 21:37:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 275 transitions. [2022-03-15 21:37:07,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:37:07,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:07,426 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:07,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-15 21:37:07,641 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 21:37:07,641 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:07,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1927180502, now seen corresponding path program 67 times [2022-03-15 21:37:07,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:07,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428311523] [2022-03-15 21:37:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:07,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:07,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:07,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428311523] [2022-03-15 21:37:07,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428311523] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:07,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939578678] [2022-03-15 21:37:07,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:37:07,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:07,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:07,906 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 21:37:07,907 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 21:37:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:07,932 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 21:37:07,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:08,371 INFO L353 Elim1Store]: treesize reduction 120, result has 0.8 percent of original size [2022-03-15 21:37:08,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 32 [2022-03-15 21:37:08,459 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:08,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:09,075 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 21:37:09,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 98 treesize of output 284 [2022-03-15 21:37:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:09,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939578678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:09,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:09,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 38 [2022-03-15 21:37:09,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1478843567] [2022-03-15 21:37:09,455 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:09,456 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:09,460 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 53 transitions. [2022-03-15 21:37:09,460 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:09,982 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [37140#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 37138#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 37139#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 37142#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 37141#(and (<= 0 s) (= q_back q_front) (<= s 0)), 37137#(and (<= 5 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1))] [2022-03-15 21:37:09,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:37:09,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:09,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:37:09,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 21:37:09,983 INFO L87 Difference]: Start difference. First operand 131 states and 275 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) 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 21:37:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:11,113 INFO L93 Difference]: Finished difference Result 215 states and 436 transitions. [2022-03-15 21:37:11,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:37:11,114 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) 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 21 [2022-03-15 21:37:11,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:11,114 INFO L225 Difference]: With dead ends: 215 [2022-03-15 21:37:11,114 INFO L226 Difference]: Without dead ends: 198 [2022-03-15 21:37:11,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=308, Invalid=4384, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:37:11,115 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:11,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 11 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:11,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-03-15 21:37:11,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 130. [2022-03-15 21:37:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.116279069767442) internal successors, (273), 129 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 273 transitions. [2022-03-15 21:37:11,125 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 273 transitions. Word has length 21 [2022-03-15 21:37:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:11,125 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 273 transitions. [2022-03-15 21:37:11,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) 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 21:37:11,126 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 273 transitions. [2022-03-15 21:37:11,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:37:11,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:11,126 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:11,141 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 21:37:11,326 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 21:37:11,326 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:11,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1074252432, now seen corresponding path program 68 times [2022-03-15 21:37:11,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:11,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714390749] [2022-03-15 21:37:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:11,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:11,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:11,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714390749] [2022-03-15 21:37:11,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714390749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:11,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956878842] [2022-03-15 21:37:11,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:37:11,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:11,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:11,614 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 21:37:11,614 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 21:37:11,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:37:11,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:11,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-15 21:37:11,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:12,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:12,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:37:12,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 55 [2022-03-15 21:37:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:12,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:12,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:12,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:13,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:37:13,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 205 [2022-03-15 21:37:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:13,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956878842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:13,296 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:13,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2022-03-15 21:37:13,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1877154416] [2022-03-15 21:37:13,297 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:13,298 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:13,301 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 51 transitions. [2022-03-15 21:37:13,301 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:13,817 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [37830#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 37829#(and (<= 5 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1)), 37833#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 37834#(and (<= 0 s) (= q_back q_front) (<= s 0)), 37832#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 37831#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:37:13,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:37:13,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:13,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:37:13,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2227, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:37:13,818 INFO L87 Difference]: Start difference. First operand 130 states and 273 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) 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 21:37:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:15,049 INFO L93 Difference]: Finished difference Result 234 states and 494 transitions. [2022-03-15 21:37:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:37:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) 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 21 [2022-03-15 21:37:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:15,050 INFO L225 Difference]: With dead ends: 234 [2022-03-15 21:37:15,050 INFO L226 Difference]: Without dead ends: 220 [2022-03-15 21:37:15,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1446 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=616, Invalid=5084, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:37:15,051 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:15,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 8 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-15 21:37:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 129. [2022-03-15 21:37:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1171875) internal successors, (271), 128 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 271 transitions. [2022-03-15 21:37:15,060 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 271 transitions. Word has length 21 [2022-03-15 21:37:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:15,060 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 271 transitions. [2022-03-15 21:37:15,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) 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 21:37:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 271 transitions. [2022-03-15 21:37:15,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 21:37:15,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:15,061 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:15,078 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 21:37:15,275 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 21:37:15,275 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:15,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:15,276 INFO L85 PathProgramCache]: Analyzing trace with hash -338734698, now seen corresponding path program 69 times [2022-03-15 21:37:15,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:15,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400000674] [2022-03-15 21:37:15,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:15,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:15,544 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:15,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400000674] [2022-03-15 21:37:15,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400000674] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:15,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463752888] [2022-03-15 21:37:15,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:37:15,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:15,545 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 21:37:15,546 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 21:37:15,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:37:15,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:15,586 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-15 21:37:15,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:16,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:16,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:37:16,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 81 [2022-03-15 21:37:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:16,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:16,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:16,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:37:16,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 205 [2022-03-15 21:37:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:17,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463752888] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:17,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:17,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 43 [2022-03-15 21:37:17,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [650649973] [2022-03-15 21:37:17,287 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:17,288 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:17,292 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 49 transitions. [2022-03-15 21:37:17,292 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:17,764 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [38543#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 38544#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 38545#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 38546#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 38542#(and (<= 5 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1)), 38547#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:37:17,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:37:17,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:17,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:37:17,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=2233, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:37:17,765 INFO L87 Difference]: Start difference. First operand 129 states and 271 transitions. Second operand has 23 states, 22 states have (on average 1.8181818181818181) 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 21:37:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:18,956 INFO L93 Difference]: Finished difference Result 210 states and 424 transitions. [2022-03-15 21:37:18,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:37:18,956 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8181818181818181) 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 21 [2022-03-15 21:37:18,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:18,957 INFO L225 Difference]: With dead ends: 210 [2022-03-15 21:37:18,957 INFO L226 Difference]: Without dead ends: 203 [2022-03-15 21:37:18,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1518 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=629, Invalid=5377, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:37:18,957 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:18,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 6 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:18,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-15 21:37:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 127. [2022-03-15 21:37:18,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.119047619047619) internal successors, (267), 126 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:18,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 267 transitions. [2022-03-15 21:37:18,959 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 267 transitions. Word has length 21 [2022-03-15 21:37:18,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:18,959 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 267 transitions. [2022-03-15 21:37:18,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8181818181818181) 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 21:37:18,960 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 267 transitions. [2022-03-15 21:37:18,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:37:18,960 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:18,960 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:18,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-15 21:37:19,171 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 21:37:19,171 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:19,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:19,172 INFO L85 PathProgramCache]: Analyzing trace with hash -526041620, now seen corresponding path program 70 times [2022-03-15 21:37:19,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:19,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490164920] [2022-03-15 21:37:19,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:19,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:19,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:19,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490164920] [2022-03-15 21:37:19,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490164920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:19,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943791025] [2022-03-15 21:37:19,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:37:19,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:19,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:19,231 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 21:37:19,232 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 21:37:19,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:37:19,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:19,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 21:37:19,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:19,359 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:19,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 28 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:19,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943791025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:19,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:19,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-03-15 21:37:19,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [305770616] [2022-03-15 21:37:19,408 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:19,409 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:19,414 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 68 transitions. [2022-03-15 21:37:19,414 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:19,512 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:37:19,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:37:19,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:19,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:37:19,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-03-15 21:37:19,513 INFO L87 Difference]: Start difference. First operand 127 states and 267 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 21:37:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:19,579 INFO L93 Difference]: Finished difference Result 248 states and 492 transitions. [2022-03-15 21:37:19,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:37:19,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 21:37:19,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:19,580 INFO L225 Difference]: With dead ends: 248 [2022-03-15 21:37:19,581 INFO L226 Difference]: Without dead ends: 231 [2022-03-15 21:37:19,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-03-15 21:37:19,581 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:19,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 2 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:37:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-15 21:37:19,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 143. [2022-03-15 21:37:19,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.140845070422535) internal successors, (304), 142 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:19,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 304 transitions. [2022-03-15 21:37:19,583 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 304 transitions. Word has length 22 [2022-03-15 21:37:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:19,583 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 304 transitions. [2022-03-15 21:37:19,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 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 21:37:19,583 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 304 transitions. [2022-03-15 21:37:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:37:19,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:19,584 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:19,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-15 21:37:19,795 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 21:37:19,795 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:19,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:19,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1858767725, now seen corresponding path program 71 times [2022-03-15 21:37:19,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:19,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355592444] [2022-03-15 21:37:19,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:19,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:19,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:19,877 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:19,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355592444] [2022-03-15 21:37:19,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355592444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:19,877 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807910647] [2022-03-15 21:37:19,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:37:19,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:19,878 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 21:37:19,879 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 21:37:19,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:37:19,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:19,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:37:19,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:19,958 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:19,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:19,977 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 21:37:19,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 21:37:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:20,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807910647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:20,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:20,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2022-03-15 21:37:20,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [976171030] [2022-03-15 21:37:20,018 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:20,019 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:20,023 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 50 transitions. [2022-03-15 21:37:20,023 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:20,100 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:37:20,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:37:20,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:20,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:37:20,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:37:20,101 INFO L87 Difference]: Start difference. First operand 143 states and 304 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:20,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:20,447 INFO L93 Difference]: Finished difference Result 371 states and 751 transitions. [2022-03-15 21:37:20,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:37:20,448 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:37:20,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:20,449 INFO L225 Difference]: With dead ends: 371 [2022-03-15 21:37:20,449 INFO L226 Difference]: Without dead ends: 371 [2022-03-15 21:37:20,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:37:20,449 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 60 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:20,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 17 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:20,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-15 21:37:20,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 189. [2022-03-15 21:37:20,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.345744680851064) internal successors, (441), 188 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 441 transitions. [2022-03-15 21:37:20,452 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 441 transitions. Word has length 22 [2022-03-15 21:37:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:20,452 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 441 transitions. [2022-03-15 21:37:20,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 441 transitions. [2022-03-15 21:37:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:37:20,453 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:20,453 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:20,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-15 21:37:20,653 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 21:37:20,653 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:20,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:20,653 INFO L85 PathProgramCache]: Analyzing trace with hash -167905787, now seen corresponding path program 72 times [2022-03-15 21:37:20,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:20,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068518361] [2022-03-15 21:37:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:20,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:20,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:20,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068518361] [2022-03-15 21:37:20,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068518361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:20,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192832654] [2022-03-15 21:37:20,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:37:20,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:20,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:20,730 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 21:37:20,740 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 21:37:20,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:37:20,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:20,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:37:20,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:20,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:20,862 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:37:20,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:37:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:20,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192832654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:20,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:20,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2022-03-15 21:37:20,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1842370525] [2022-03-15 21:37:20,904 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:20,906 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:20,910 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 52 transitions. [2022-03-15 21:37:20,910 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:21,013 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:37:21,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:37:21,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:21,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:37:21,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:37:21,014 INFO L87 Difference]: Start difference. First operand 189 states and 441 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 21:37:21,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:21,575 INFO L93 Difference]: Finished difference Result 719 states and 1483 transitions. [2022-03-15 21:37:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 21:37:21,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 22 [2022-03-15 21:37:21,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:21,577 INFO L225 Difference]: With dead ends: 719 [2022-03-15 21:37:21,577 INFO L226 Difference]: Without dead ends: 719 [2022-03-15 21:37:21,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:37:21,578 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 148 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:21,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 19 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:21,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-03-15 21:37:21,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 241. [2022-03-15 21:37:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.425) internal successors, (582), 240 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 582 transitions. [2022-03-15 21:37:21,582 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 582 transitions. Word has length 22 [2022-03-15 21:37:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:21,583 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 582 transitions. [2022-03-15 21:37:21,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 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 21:37:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 582 transitions. [2022-03-15 21:37:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:37:21,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:21,583 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:21,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-15 21:37:21,784 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 21:37:21,784 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:21,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:21,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1429724781, now seen corresponding path program 73 times [2022-03-15 21:37:21,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:21,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913200589] [2022-03-15 21:37:21,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:21,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:21,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:21,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:21,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913200589] [2022-03-15 21:37:21,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913200589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:21,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266144981] [2022-03-15 21:37:21,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:37:21,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:21,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:21,868 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 21:37:21,870 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 21:37:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:21,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:37:21,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:22,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:22,062 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:37:22,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:37:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:22,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266144981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:22,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:22,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2022-03-15 21:37:22,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1012749475] [2022-03-15 21:37:22,101 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:22,102 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:22,107 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 54 transitions. [2022-03-15 21:37:22,107 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:22,209 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:37:22,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:37:22,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:22,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:37:22,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:37:22,209 INFO L87 Difference]: Start difference. First operand 241 states and 582 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:37:23,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:23,178 INFO L93 Difference]: Finished difference Result 1455 states and 3076 transitions. [2022-03-15 21:37:23,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-15 21:37:23,178 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:37:23,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:23,183 INFO L225 Difference]: With dead ends: 1455 [2022-03-15 21:37:23,183 INFO L226 Difference]: Without dead ends: 1455 [2022-03-15 21:37:23,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 52 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=757, Invalid=5885, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 21:37:23,184 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 255 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:23,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 21 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:23,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2022-03-15 21:37:23,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 339. [2022-03-15 21:37:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.497041420118343) internal successors, (844), 338 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:23,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 844 transitions. [2022-03-15 21:37:23,192 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 844 transitions. Word has length 22 [2022-03-15 21:37:23,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:23,192 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 844 transitions. [2022-03-15 21:37:23,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 21:37:23,192 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 844 transitions. [2022-03-15 21:37:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:37:23,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:23,193 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:23,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-15 21:37:23,401 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 21:37:23,402 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:23,402 INFO L85 PathProgramCache]: Analyzing trace with hash -583335163, now seen corresponding path program 74 times [2022-03-15 21:37:23,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:23,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398054666] [2022-03-15 21:37:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:23,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:23,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:23,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:23,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398054666] [2022-03-15 21:37:23,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398054666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:23,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771676491] [2022-03-15 21:37:23,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:37:23,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:23,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:23,500 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 21:37:23,501 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 21:37:23,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:37:23,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:37:23,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:23,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:23,636 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:37:23,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:37:23,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:23,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771676491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:23,679 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:23,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2022-03-15 21:37:23,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [447212698] [2022-03-15 21:37:23,679 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:23,680 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:23,684 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 56 transitions. [2022-03-15 21:37:23,684 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:23,790 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:37:23,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:37:23,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:23,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:37:23,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:37:23,791 INFO L87 Difference]: Start difference. First operand 339 states and 844 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 21:37:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:25,522 INFO L93 Difference]: Finished difference Result 2707 states and 5847 transitions. [2022-03-15 21:37:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-15 21:37:25,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 21:37:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:25,530 INFO L225 Difference]: With dead ends: 2707 [2022-03-15 21:37:25,530 INFO L226 Difference]: Without dead ends: 2707 [2022-03-15 21:37:25,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6510 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1689, Invalid=15341, Unknown=0, NotChecked=0, Total=17030 [2022-03-15 21:37:25,531 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 380 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:25,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 23 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:37:25,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2707 states. [2022-03-15 21:37:25,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2707 to 503. [2022-03-15 21:37:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 502 states have (on average 2.5597609561752988) internal successors, (1285), 502 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 1285 transitions. [2022-03-15 21:37:25,548 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 1285 transitions. Word has length 22 [2022-03-15 21:37:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:25,548 INFO L470 AbstractCegarLoop]: Abstraction has 503 states and 1285 transitions. [2022-03-15 21:37:25,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 21:37:25,548 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 1285 transitions. [2022-03-15 21:37:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:37:25,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:25,549 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:25,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:25,755 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 21:37:25,755 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:25,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1436316013, now seen corresponding path program 75 times [2022-03-15 21:37:25,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:25,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680066437] [2022-03-15 21:37:25,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:25,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:25,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:25,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680066437] [2022-03-15 21:37:25,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680066437] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:25,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299515830] [2022-03-15 21:37:25,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:37:25,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:25,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:25,858 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 21:37:25,859 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 21:37:25,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:37:25,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:25,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 21:37:25,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:25,960 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:25,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:26,039 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:37:26,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:37:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:26,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299515830] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:26,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:26,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 19 [2022-03-15 21:37:26,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1611753340] [2022-03-15 21:37:26,074 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:26,076 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:26,080 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 58 transitions. [2022-03-15 21:37:26,080 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:26,208 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:37:26,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:37:26,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:26,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:37:26,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:37:26,209 INFO L87 Difference]: Start difference. First operand 503 states and 1285 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 21:37:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:26,618 INFO L93 Difference]: Finished difference Result 916 states and 1874 transitions. [2022-03-15 21:37:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-15 21:37:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 21:37:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:26,620 INFO L225 Difference]: With dead ends: 916 [2022-03-15 21:37:26,620 INFO L226 Difference]: Without dead ends: 916 [2022-03-15 21:37:26,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 21:37:26,621 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 91 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:26,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 25 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2022-03-15 21:37:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 151. [2022-03-15 21:37:26,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.1333333333333333) internal successors, (320), 150 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:26,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 320 transitions. [2022-03-15 21:37:26,625 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 320 transitions. Word has length 22 [2022-03-15 21:37:26,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:26,625 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 320 transitions. [2022-03-15 21:37:26,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 21:37:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 320 transitions. [2022-03-15 21:37:26,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:37:26,626 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:26,626 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:26,641 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 21:37:26,826 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 21:37:26,826 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:26,826 INFO L85 PathProgramCache]: Analyzing trace with hash -379006971, now seen corresponding path program 76 times [2022-03-15 21:37:26,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:26,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698527199] [2022-03-15 21:37:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:26,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:26,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:26,941 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 21:37:26,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:26,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698527199] [2022-03-15 21:37:26,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698527199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:26,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182094238] [2022-03-15 21:37:26,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:37:26,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:26,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:26,943 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 21:37:26,943 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 21:37:26,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:37:26,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:26,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 21:37:26,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:27,126 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 21:37:27,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:27,172 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:37:27,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:37:27,218 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 21:37:27,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182094238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:27,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:27,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-03-15 21:37:27,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [64697396] [2022-03-15 21:37:27,218 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:27,220 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:27,225 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 70 transitions. [2022-03-15 21:37:27,225 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:27,414 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:37:27,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:37:27,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:27,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:37:27,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:37:27,414 INFO L87 Difference]: Start difference. First operand 151 states and 320 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:37:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:27,935 INFO L93 Difference]: Finished difference Result 516 states and 1074 transitions. [2022-03-15 21:37:27,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:37:27,935 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:37:27,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:27,937 INFO L225 Difference]: With dead ends: 516 [2022-03-15 21:37:27,937 INFO L226 Difference]: Without dead ends: 516 [2022-03-15 21:37:27,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=337, Invalid=2213, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:37:27,937 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 92 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:27,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 23 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:37:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-03-15 21:37:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 167. [2022-03-15 21:37:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1506024096385543) internal successors, (357), 166 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:27,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 357 transitions. [2022-03-15 21:37:27,948 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 357 transitions. Word has length 22 [2022-03-15 21:37:27,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:27,948 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 357 transitions. [2022-03-15 21:37:27,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 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 21:37:27,948 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 357 transitions. [2022-03-15 21:37:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:37:27,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:27,949 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:27,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-15 21:37:28,163 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 21:37:28,163 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:28,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1787349551, now seen corresponding path program 77 times [2022-03-15 21:37:28,164 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:28,164 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71069235] [2022-03-15 21:37:28,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:28,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:28,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:28,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71069235] [2022-03-15 21:37:28,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71069235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:28,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050296800] [2022-03-15 21:37:28,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:37:28,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:28,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:28,406 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 21:37:28,406 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 21:37:28,433 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:37:28,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:28,435 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-15 21:37:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:28,986 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 21:37:28,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 167 treesize of output 83 [2022-03-15 21:37:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:29,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:29,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:29,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:37:29,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 123 treesize of output 291 [2022-03-15 21:37:30,098 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:30,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050296800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:30,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:30,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 44 [2022-03-15 21:37:30,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1105435274] [2022-03-15 21:37:30,098 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:30,100 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:30,104 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 53 transitions. [2022-03-15 21:37:30,104 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:30,602 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [51201#(and (<= 0 s) (= q_back q_front) (<= s 0)), 51198#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 51196#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 51199#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 51200#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 51197#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:37:30,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:37:30,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:30,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:37:30,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2322, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:37:30,602 INFO L87 Difference]: Start difference. First operand 167 states and 357 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 21:37:31,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:31,334 INFO L93 Difference]: Finished difference Result 201 states and 413 transitions. [2022-03-15 21:37:31,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 21:37:31,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 23 [2022-03-15 21:37:31,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:31,335 INFO L225 Difference]: With dead ends: 201 [2022-03-15 21:37:31,335 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 21:37:31,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=533, Invalid=4023, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:37:31,335 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:31,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:31,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 21:37:31,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 168. [2022-03-15 21:37:31,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1497005988023954) internal successors, (359), 167 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:31,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 359 transitions. [2022-03-15 21:37:31,337 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 359 transitions. Word has length 23 [2022-03-15 21:37:31,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:31,337 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 359 transitions. [2022-03-15 21:37:31,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 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 21:37:31,337 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 359 transitions. [2022-03-15 21:37:31,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:37:31,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:31,338 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:31,353 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 21:37:31,546 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 21:37:31,546 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:31,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash 374362421, now seen corresponding path program 78 times [2022-03-15 21:37:31,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:31,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912573650] [2022-03-15 21:37:31,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:31,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:31,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:31,800 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:31,800 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:31,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912573650] [2022-03-15 21:37:31,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912573650] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:31,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595979511] [2022-03-15 21:37:31,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:37:31,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:31,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:31,812 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 21:37:31,813 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 21:37:31,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:37:31,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:31,844 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-15 21:37:31,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:32,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:32,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 44 [2022-03-15 21:37:32,468 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:32,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:33,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:33,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:37:33,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 117 treesize of output 279 [2022-03-15 21:37:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:33,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595979511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:33,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:33,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 44 [2022-03-15 21:37:33,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1527081612] [2022-03-15 21:37:33,727 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:33,729 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:33,733 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 51 transitions. [2022-03-15 21:37:33,733 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:34,252 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [51953#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 51952#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 51951#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 51949#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 51954#(and (<= 0 s) (= q_back q_front) (<= s 0)), 51950#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:37:34,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 21:37:34,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:34,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 21:37:34,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2306, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 21:37:34,253 INFO L87 Difference]: Start difference. First operand 168 states and 359 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 21:37:35,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:35,016 INFO L93 Difference]: Finished difference Result 202 states and 413 transitions. [2022-03-15 21:37:35,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:37:35,016 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 23 [2022-03-15 21:37:35,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:35,017 INFO L225 Difference]: With dead ends: 202 [2022-03-15 21:37:35,017 INFO L226 Difference]: Without dead ends: 195 [2022-03-15 21:37:35,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=573, Invalid=4119, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:37:35,017 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:35,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:35,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-15 21:37:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 167. [2022-03-15 21:37:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1506024096385543) internal successors, (357), 166 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:35,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 357 transitions. [2022-03-15 21:37:35,019 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 357 transitions. Word has length 23 [2022-03-15 21:37:35,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:35,020 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 357 transitions. [2022-03-15 21:37:35,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 21:37:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 357 transitions. [2022-03-15 21:37:35,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:37:35,020 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:35,020 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:35,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:35,220 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 21:37:35,220 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:35,221 INFO L85 PathProgramCache]: Analyzing trace with hash -909987177, now seen corresponding path program 79 times [2022-03-15 21:37:35,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:35,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393008678] [2022-03-15 21:37:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:35,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:35,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:35,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393008678] [2022-03-15 21:37:35,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393008678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:35,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055105999] [2022-03-15 21:37:35,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:37:35,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:35,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:35,490 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 21:37:35,493 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 21:37:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:35,518 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:37:35,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:36,093 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:37:36,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:37:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:36,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:37,021 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:37:37,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:37:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:37,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055105999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:37,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:37,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 40 [2022-03-15 21:37:37,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [838382648] [2022-03-15 21:37:37,648 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:37,654 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:37,658 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 55 transitions. [2022-03-15 21:37:37,658 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:38,188 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [52701#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 52703#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 52702#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 52704#(and (<= 0 s) (= q_back q_front) (<= s 0)), 52699#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 52700#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:37:38,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:37:38,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:38,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:37:38,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2100, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:37:38,189 INFO L87 Difference]: Start difference. First operand 167 states and 357 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 20 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 21:37:39,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:39,066 INFO L93 Difference]: Finished difference Result 203 states and 416 transitions. [2022-03-15 21:37:39,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-15 21:37:39,066 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 20 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 23 [2022-03-15 21:37:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:39,067 INFO L225 Difference]: With dead ends: 203 [2022-03-15 21:37:39,067 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 21:37:39,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=283, Invalid=3877, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:37:39,067 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:39,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 21:37:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 168. [2022-03-15 21:37:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1497005988023954) internal successors, (359), 167 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 359 transitions. [2022-03-15 21:37:39,069 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 359 transitions. Word has length 23 [2022-03-15 21:37:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:39,069 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 359 transitions. [2022-03-15 21:37:39,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 20 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 21:37:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 359 transitions. [2022-03-15 21:37:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:37:39,071 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:39,071 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:39,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:39,271 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 21:37:39,272 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:39,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1762915247, now seen corresponding path program 80 times [2022-03-15 21:37:39,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:39,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489436056] [2022-03-15 21:37:39,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:39,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:39,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:39,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:39,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489436056] [2022-03-15 21:37:39,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489436056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:39,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049148008] [2022-03-15 21:37:39,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:37:39,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:39,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:39,554 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 21:37:39,554 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 21:37:39,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:37:39,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:39,581 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:37:39,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:40,141 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:37:40,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:37:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:40,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:41,086 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:37:41,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:37:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:41,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049148008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:41,446 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:41,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 17, 17] total 40 [2022-03-15 21:37:41,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [367273639] [2022-03-15 21:37:41,446 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:41,448 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:41,457 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 53 transitions. [2022-03-15 21:37:41,458 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:41,953 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [53456#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 53455#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 53457#(and (<= 0 s) (= q_back q_front) (<= s 0)), 53453#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 53452#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 53454#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:37:41,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 21:37:41,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:41,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 21:37:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2100, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:37:41,954 INFO L87 Difference]: Start difference. First operand 168 states and 359 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 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 21:37:42,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:42,820 INFO L93 Difference]: Finished difference Result 205 states and 421 transitions. [2022-03-15 21:37:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:37:42,821 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 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 23 [2022-03-15 21:37:42,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:42,821 INFO L225 Difference]: With dead ends: 205 [2022-03-15 21:37:42,821 INFO L226 Difference]: Without dead ends: 196 [2022-03-15 21:37:42,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=300, Invalid=3990, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:37:42,822 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:42,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 8 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:37:42,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-15 21:37:42,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 169. [2022-03-15 21:37:42,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.1488095238095237) internal successors, (361), 168 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 361 transitions. [2022-03-15 21:37:42,824 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 361 transitions. Word has length 23 [2022-03-15 21:37:42,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:42,824 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 361 transitions. [2022-03-15 21:37:42,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 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 21:37:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 361 transitions. [2022-03-15 21:37:42,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:37:42,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:42,824 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:42,842 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 21:37:43,039 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 21:37:43,039 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:43,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1119064919, now seen corresponding path program 81 times [2022-03-15 21:37:43,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:43,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138673157] [2022-03-15 21:37:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:43,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:43,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:43,357 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:43,358 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:43,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138673157] [2022-03-15 21:37:43,358 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138673157] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:43,358 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709692230] [2022-03-15 21:37:43,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:37:43,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:43,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:43,359 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 21:37:43,359 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 21:37:43,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:37:43,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:43,388 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-15 21:37:43,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:43,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:43,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:37:43,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 28 [2022-03-15 21:37:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:44,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:44,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:37:44,938 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:37:44,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 119 treesize of output 279 [2022-03-15 21:37:45,299 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:45,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709692230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:45,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:45,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 47 [2022-03-15 21:37:45,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [374344091] [2022-03-15 21:37:45,299 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:45,301 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:45,305 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 51 transitions. [2022-03-15 21:37:45,305 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:45,785 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [54219#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 54221#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 54222#(and (<= 0 s) (= q_back q_front) (<= s 0)), 54220#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 54218#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= 5 i)), 54223#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:37:45,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:37:45,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:45,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:37:45,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:37:45,786 INFO L87 Difference]: Start difference. First operand 169 states and 361 transitions. Second operand has 25 states, 24 states have (on average 1.75) 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 21:37:46,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:46,900 INFO L93 Difference]: Finished difference Result 229 states and 477 transitions. [2022-03-15 21:37:46,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:37:46,901 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.75) 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 23 [2022-03-15 21:37:46,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:46,901 INFO L225 Difference]: With dead ends: 229 [2022-03-15 21:37:46,902 INFO L226 Difference]: Without dead ends: 222 [2022-03-15 21:37:46,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=746, Invalid=5734, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:37:46,902 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:46,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:46,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-03-15 21:37:46,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 184. [2022-03-15 21:37:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.180327868852459) internal successors, (399), 183 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 399 transitions. [2022-03-15 21:37:46,904 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 399 transitions. Word has length 23 [2022-03-15 21:37:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:46,905 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 399 transitions. [2022-03-15 21:37:46,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.75) 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 21:37:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 399 transitions. [2022-03-15 21:37:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:37:46,905 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:46,905 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:46,922 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 21:37:47,114 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 21:37:47,114 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:47,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:47,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1371920175, now seen corresponding path program 82 times [2022-03-15 21:37:47,115 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:47,115 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584789281] [2022-03-15 21:37:47,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:47,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:47,411 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:47,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584789281] [2022-03-15 21:37:47,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584789281] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:47,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296783417] [2022-03-15 21:37:47,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:37:47,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:47,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:47,413 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 21:37:47,414 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 21:37:47,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:37:47,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:47,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:37:47,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:48,002 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:37:48,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:37:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:48,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:48,945 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:37:48,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:37:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:49,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296783417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:49,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:49,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 41 [2022-03-15 21:37:49,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [393507303] [2022-03-15 21:37:49,493 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:49,495 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:49,499 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 57 transitions. [2022-03-15 21:37:49,499 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:50,095 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [55050#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 55048#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 55053#(and (<= 0 s) (= q_back q_front) (<= s 0)), 55051#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 55049#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 55052#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:37:50,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:37:50,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:50,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:37:50,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2196, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:37:50,096 INFO L87 Difference]: Start difference. First operand 184 states and 399 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 21:37:51,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:51,061 INFO L93 Difference]: Finished difference Result 223 states and 464 transitions. [2022-03-15 21:37:51,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 21:37:51,061 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 23 [2022-03-15 21:37:51,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:51,062 INFO L225 Difference]: With dead ends: 223 [2022-03-15 21:37:51,062 INFO L226 Difference]: Without dead ends: 210 [2022-03-15 21:37:51,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=286, Invalid=4136, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:37:51,062 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:51,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:51,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-15 21:37:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 186. [2022-03-15 21:37:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1783783783783783) internal successors, (403), 185 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:51,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 403 transitions. [2022-03-15 21:37:51,065 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 403 transitions. Word has length 23 [2022-03-15 21:37:51,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:51,065 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 403 transitions. [2022-03-15 21:37:51,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 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 21:37:51,065 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 403 transitions. [2022-03-15 21:37:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:37:51,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:51,065 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:51,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-15 21:37:51,266 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 21:37:51,266 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash 700953781, now seen corresponding path program 83 times [2022-03-15 21:37:51,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:51,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373933983] [2022-03-15 21:37:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:51,534 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:51,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:51,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373933983] [2022-03-15 21:37:51,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373933983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:51,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320545899] [2022-03-15 21:37:51,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:37:51,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:51,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:51,536 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 21:37:51,536 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 21:37:51,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:37:51,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:51,564 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:37:51,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:52,144 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 21:37:52,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 38 [2022-03-15 21:37:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:52,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:53,140 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:37:53,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 123 treesize of output 401 [2022-03-15 21:37:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:53,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320545899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:53,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:53,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 41 [2022-03-15 21:37:53,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2124367953] [2022-03-15 21:37:53,613 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:53,615 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:53,619 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 55 transitions. [2022-03-15 21:37:53,619 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:54,163 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [55864#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 55863#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 55860#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 55865#(and (<= 0 s) (= q_back q_front) (<= s 0)), 55862#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 55861#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:37:54,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:37:54,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:54,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:37:54,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2194, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:37:54,164 INFO L87 Difference]: Start difference. First operand 186 states and 403 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 21:37:55,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:55,135 INFO L93 Difference]: Finished difference Result 225 states and 469 transitions. [2022-03-15 21:37:55,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:37:55,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 23 [2022-03-15 21:37:55,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:55,136 INFO L225 Difference]: With dead ends: 225 [2022-03-15 21:37:55,136 INFO L226 Difference]: Without dead ends: 214 [2022-03-15 21:37:55,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=306, Invalid=4250, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:37:55,137 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:55,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 11 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:55,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-15 21:37:55,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 188. [2022-03-15 21:37:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.176470588235294) internal successors, (407), 187 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 407 transitions. [2022-03-15 21:37:55,140 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 407 transitions. Word has length 23 [2022-03-15 21:37:55,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:55,140 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 407 transitions. [2022-03-15 21:37:55,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 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 21:37:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 407 transitions. [2022-03-15 21:37:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:37:55,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:55,141 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:55,157 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 21:37:55,357 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 21:37:55,357 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:55,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:55,357 INFO L85 PathProgramCache]: Analyzing trace with hash -151974289, now seen corresponding path program 84 times [2022-03-15 21:37:55,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:55,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692889772] [2022-03-15 21:37:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:55,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:55,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:55,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692889772] [2022-03-15 21:37:55,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692889772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:55,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939830979] [2022-03-15 21:37:55,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:37:55,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:55,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:55,645 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 21:37:55,646 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 21:37:55,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:37:55,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:37:55,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-15 21:37:55,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:37:56,262 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 21:37:56,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 38 [2022-03-15 21:37:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:56,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:37:57,214 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:37:57,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:37:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:37:57,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939830979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:37:57,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:37:57,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 41 [2022-03-15 21:37:57,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [356748469] [2022-03-15 21:37:57,839 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:37:57,840 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:37:57,845 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 53 transitions. [2022-03-15 21:37:57,845 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:37:58,373 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [56684#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 56683#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 56682#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 56685#(and (<= 0 s) (= q_back q_front) (<= s 0)), 56680#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 56681#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:37:58,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:37:58,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:37:58,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:37:58,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2196, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:37:58,374 INFO L87 Difference]: Start difference. First operand 188 states and 407 transitions. Second operand has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 21:37:59,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:37:59,414 INFO L93 Difference]: Finished difference Result 227 states and 474 transitions. [2022-03-15 21:37:59,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:37:59,415 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 23 [2022-03-15 21:37:59,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:37:59,415 INFO L225 Difference]: With dead ends: 227 [2022-03-15 21:37:59,415 INFO L226 Difference]: Without dead ends: 218 [2022-03-15 21:37:59,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=318, Invalid=4374, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:37:59,416 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:37:59,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 9 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:37:59,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-15 21:37:59,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 188. [2022-03-15 21:37:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.176470588235294) internal successors, (407), 187 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:37:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 407 transitions. [2022-03-15 21:37:59,418 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 407 transitions. Word has length 23 [2022-03-15 21:37:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:37:59,418 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 407 transitions. [2022-03-15 21:37:59,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 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 21:37:59,418 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 407 transitions. [2022-03-15 21:37:59,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:37:59,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:37:59,419 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:37:59,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-15 21:37:59,619 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 21:37:59,619 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:37:59,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:37:59,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1564961419, now seen corresponding path program 85 times [2022-03-15 21:37:59,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:37:59,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358670714] [2022-03-15 21:37:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:37:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:37:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:37:59,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:37:59,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358670714] [2022-03-15 21:37:59,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358670714] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:37:59,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84209290] [2022-03-15 21:37:59,885 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:37:59,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:37:59,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:37:59,886 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 21:37:59,887 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 21:37:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:37:59,912 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:37:59,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:00,407 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 21:38:00,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 28 [2022-03-15 21:38:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:00,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:01,397 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:01,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:38:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:01,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84209290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:01,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:01,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 41 [2022-03-15 21:38:01,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1838221134] [2022-03-15 21:38:01,884 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:01,885 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:01,890 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 51 transitions. [2022-03-15 21:38:01,890 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:02,379 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [57504#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 57509#(and (<= 0 s) (= q_back q_front) (<= s 0)), 57505#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 57507#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 57508#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 57506#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:38:02,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:38:02,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:02,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:38:02,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 21:38:02,380 INFO L87 Difference]: Start difference. First operand 188 states and 407 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 21 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 21:38:03,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:03,398 INFO L93 Difference]: Finished difference Result 228 states and 472 transitions. [2022-03-15 21:38:03,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:38:03,398 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 21 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 23 [2022-03-15 21:38:03,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:03,399 INFO L225 Difference]: With dead ends: 228 [2022-03-15 21:38:03,399 INFO L226 Difference]: Without dead ends: 221 [2022-03-15 21:38:03,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=324, Invalid=4506, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:38:03,399 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:03,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 7 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-15 21:38:03,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2022-03-15 21:38:03,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1506024096385543) internal successors, (357), 166 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 357 transitions. [2022-03-15 21:38:03,401 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 357 transitions. Word has length 23 [2022-03-15 21:38:03,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:03,402 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 357 transitions. [2022-03-15 21:38:03,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 21 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 21:38:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 357 transitions. [2022-03-15 21:38:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:03,402 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:03,402 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:03,418 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-15 21:38:03,611 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 21:38:03,611 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash -903395945, now seen corresponding path program 86 times [2022-03-15 21:38:03,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:03,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061168085] [2022-03-15 21:38:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:03,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:03,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:03,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061168085] [2022-03-15 21:38:03,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061168085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:03,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521868478] [2022-03-15 21:38:03,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:38:03,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:03,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:03,948 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 21:38:03,949 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 21:38:03,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:38:03,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:03,977 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:38:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:04,606 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:38:04,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:38:04,693 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:04,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:05,565 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:05,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:38:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:06,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521868478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:06,165 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:06,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 42 [2022-03-15 21:38:06,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1817122076] [2022-03-15 21:38:06,165 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:06,167 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:06,173 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 59 transitions. [2022-03-15 21:38:06,173 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:06,824 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [58294#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 58295#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 58291#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 58292#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 58290#(and (<= 0 s) (= q_back q_front) (<= s 0)), 58293#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:38:06,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:38:06,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:06,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:38:06,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2294, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:38:06,825 INFO L87 Difference]: Start difference. First operand 167 states and 357 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 21:38:07,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:07,846 INFO L93 Difference]: Finished difference Result 206 states and 420 transitions. [2022-03-15 21:38:07,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:38:07,847 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 23 [2022-03-15 21:38:07,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:07,847 INFO L225 Difference]: With dead ends: 206 [2022-03-15 21:38:07,847 INFO L226 Difference]: Without dead ends: 191 [2022-03-15 21:38:07,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=289, Invalid=4403, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 21:38:07,848 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:07,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 14 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:07,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-15 21:38:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 168. [2022-03-15 21:38:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.1497005988023954) internal successors, (359), 167 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 359 transitions. [2022-03-15 21:38:07,850 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 359 transitions. Word has length 23 [2022-03-15 21:38:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:07,850 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 359 transitions. [2022-03-15 21:38:07,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 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 21:38:07,850 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 359 transitions. [2022-03-15 21:38:07,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:07,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:07,850 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:07,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-15 21:38:08,050 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 21:38:08,051 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:08,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:08,051 INFO L85 PathProgramCache]: Analyzing trace with hash -228517679, now seen corresponding path program 87 times [2022-03-15 21:38:08,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:08,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845227887] [2022-03-15 21:38:08,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:08,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:08,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:08,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845227887] [2022-03-15 21:38:08,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845227887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:08,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698560536] [2022-03-15 21:38:08,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:38:08,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:08,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:08,396 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 21:38:08,396 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 21:38:08,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:38:08,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:08,424 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-15 21:38:08,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:09,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:09,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:38:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:09,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:09,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:09,867 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:38:09,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 123 treesize of output 291 [2022-03-15 21:38:10,334 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:10,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698560536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:10,334 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:10,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 18] total 47 [2022-03-15 21:38:10,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [103048478] [2022-03-15 21:38:10,335 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:10,336 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:10,341 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 57 transitions. [2022-03-15 21:38:10,341 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:10,922 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [59061#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 59059#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 59062#(and (<= 0 s) (= q_back q_front) (<= s 0)), 59057#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 59058#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 59060#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:38:10,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:38:10,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:10,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:38:10,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=2566, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:38:10,923 INFO L87 Difference]: Start difference. First operand 168 states and 359 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 21:38:11,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:11,914 INFO L93 Difference]: Finished difference Result 208 states and 425 transitions. [2022-03-15 21:38:11,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:38:11,915 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 23 [2022-03-15 21:38:11,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:11,915 INFO L225 Difference]: With dead ends: 208 [2022-03-15 21:38:11,915 INFO L226 Difference]: Without dead ends: 195 [2022-03-15 21:38:11,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1656 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=664, Invalid=4886, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:38:11,916 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:11,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:11,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-15 21:38:11,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 169. [2022-03-15 21:38:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.1488095238095237) internal successors, (361), 168 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 361 transitions. [2022-03-15 21:38:11,918 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 361 transitions. Word has length 23 [2022-03-15 21:38:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:11,918 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 361 transitions. [2022-03-15 21:38:11,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 21:38:11,918 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 361 transitions. [2022-03-15 21:38:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:11,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:11,918 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:11,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-15 21:38:12,119 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 21:38:12,119 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash -899484073, now seen corresponding path program 88 times [2022-03-15 21:38:12,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:12,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913264337] [2022-03-15 21:38:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:12,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:12,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:12,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913264337] [2022-03-15 21:38:12,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913264337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:12,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134077999] [2022-03-15 21:38:12,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:38:12,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:12,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:12,430 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 21:38:12,430 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 21:38:12,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:38:12,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:12,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:38:12,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:13,041 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:38:13,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:38:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:13,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:14,033 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:14,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:38:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:14,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134077999] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:14,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:14,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 42 [2022-03-15 21:38:14,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [862037852] [2022-03-15 21:38:14,423 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:14,424 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:14,434 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 55 transitions. [2022-03-15 21:38:14,434 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:14,981 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [59826#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 59825#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 59827#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 59829#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 59830#(and (<= 0 s) (= q_back q_front) (<= s 0)), 59828#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:38:14,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:38:14,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:14,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:38:14,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2294, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:38:14,982 INFO L87 Difference]: Start difference. First operand 169 states and 361 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 22 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 21:38:16,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:16,086 INFO L93 Difference]: Finished difference Result 210 states and 430 transitions. [2022-03-15 21:38:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:38:16,087 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 22 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 23 [2022-03-15 21:38:16,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:16,087 INFO L225 Difference]: With dead ends: 210 [2022-03-15 21:38:16,087 INFO L226 Difference]: Without dead ends: 199 [2022-03-15 21:38:16,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:38:16,088 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:16,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 11 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-15 21:38:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 170. [2022-03-15 21:38:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.1479289940828403) internal successors, (363), 169 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:16,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 363 transitions. [2022-03-15 21:38:16,090 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 363 transitions. Word has length 23 [2022-03-15 21:38:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:16,090 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 363 transitions. [2022-03-15 21:38:16,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 22 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 21:38:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 363 transitions. [2022-03-15 21:38:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:16,090 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:16,090 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:16,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-15 21:38:16,291 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 21:38:16,292 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:16,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:16,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1752412143, now seen corresponding path program 89 times [2022-03-15 21:38:16,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:16,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332509107] [2022-03-15 21:38:16,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:16,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:16,607 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:16,607 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:16,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332509107] [2022-03-15 21:38:16,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332509107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:16,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990287776] [2022-03-15 21:38:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:38:16,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:16,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:16,609 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 21:38:16,609 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 21:38:16,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:38:16,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:16,638 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 86 conjunts are in the unsatisfiable core [2022-03-15 21:38:16,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:17,235 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:38:17,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:38:17,321 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:17,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:18,272 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:18,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 130 treesize of output 404 [2022-03-15 21:38:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:18,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990287776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:18,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:18,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 42 [2022-03-15 21:38:18,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1308015652] [2022-03-15 21:38:18,654 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:18,655 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:18,660 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 53 transitions. [2022-03-15 21:38:18,660 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:19,193 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [60604#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 60603#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 60601#(and (<= 0 s) (= q_back q_front) (<= s 0)), 60599#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 60602#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 60600#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:38:19,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:38:19,194 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:19,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:38:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2291, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 21:38:19,194 INFO L87 Difference]: Start difference. First operand 170 states and 363 transitions. Second operand has 23 states, 22 states have (on average 1.9545454545454546) 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 21:38:20,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:20,288 INFO L93 Difference]: Finished difference Result 212 states and 435 transitions. [2022-03-15 21:38:20,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:38:20,288 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9545454545454546) 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 23 [2022-03-15 21:38:20,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:20,289 INFO L225 Difference]: With dead ends: 212 [2022-03-15 21:38:20,289 INFO L226 Difference]: Without dead ends: 203 [2022-03-15 21:38:20,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=340, Invalid=4772, Unknown=0, NotChecked=0, Total=5112 [2022-03-15 21:38:20,289 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:20,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 9 Invalid, 1009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:20,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-15 21:38:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 171. [2022-03-15 21:38:20,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.1470588235294117) internal successors, (365), 170 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 21:38:20,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 365 transitions. [2022-03-15 21:38:20,291 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 365 transitions. Word has length 23 [2022-03-15 21:38:20,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:20,291 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 365 transitions. [2022-03-15 21:38:20,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9545454545454546) 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 21:38:20,291 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 365 transitions. [2022-03-15 21:38:20,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:20,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:20,292 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:20,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-15 21:38:20,499 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 21:38:20,499 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1129568023, now seen corresponding path program 90 times [2022-03-15 21:38:20,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:20,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543902021] [2022-03-15 21:38:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:20,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:20,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543902021] [2022-03-15 21:38:20,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543902021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:20,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557017071] [2022-03-15 21:38:20,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:38:20,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:20,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:20,810 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 21:38:20,811 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 21:38:20,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:38:20,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:20,838 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-15 21:38:20,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:21,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:21,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:21,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 15 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 28 [2022-03-15 21:38:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:21,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:22,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:22,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:38:22,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 112 treesize of output 276 [2022-03-15 21:38:22,801 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:22,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557017071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:22,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:22,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 45 [2022-03-15 21:38:22,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [650507257] [2022-03-15 21:38:22,801 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:22,803 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:22,807 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 51 transitions. [2022-03-15 21:38:22,807 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:23,333 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [61386#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 61385#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 61382#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 61387#(and (<= 0 s) (= q_back q_front) (<= s 0)), 61384#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 61383#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:38:23,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:38:23,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:23,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:38:23,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=2409, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:38:23,334 INFO L87 Difference]: Start difference. First operand 171 states and 365 transitions. Second operand has 23 states, 22 states have (on average 1.9090909090909092) 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 21:38:24,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:24,414 INFO L93 Difference]: Finished difference Result 214 states and 436 transitions. [2022-03-15 21:38:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:38:24,415 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.9090909090909092) 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 23 [2022-03-15 21:38:24,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:24,415 INFO L225 Difference]: With dead ends: 214 [2022-03-15 21:38:24,415 INFO L226 Difference]: Without dead ends: 207 [2022-03-15 21:38:24,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 19 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=670, Invalid=5030, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:38:24,415 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:24,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:24,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-15 21:38:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 167. [2022-03-15 21:38:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1506024096385543) internal successors, (357), 166 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 357 transitions. [2022-03-15 21:38:24,418 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 357 transitions. Word has length 23 [2022-03-15 21:38:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:24,418 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 357 transitions. [2022-03-15 21:38:24,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.9090909090909092) 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 21:38:24,418 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 357 transitions. [2022-03-15 21:38:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:24,418 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:24,418 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:24,434 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 21:38:24,631 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 21:38:24,631 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:24,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:24,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1576248367, now seen corresponding path program 91 times [2022-03-15 21:38:24,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:24,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533871751] [2022-03-15 21:38:24,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:24,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:24,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:24,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533871751] [2022-03-15 21:38:24,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533871751] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:24,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236781449] [2022-03-15 21:38:24,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:38:24,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:24,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:24,967 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 21:38:24,968 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 21:38:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:25,008 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:38:25,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:25,594 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:38:25,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:38:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:25,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:26,565 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:26,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:38:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:26,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236781449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:26,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:26,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-03-15 21:38:26,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1556204259] [2022-03-15 21:38:26,985 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:26,987 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:26,991 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 61 transitions. [2022-03-15 21:38:26,991 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:27,691 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [62159#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 62162#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 62164#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 62160#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 62161#(and (<= 0 s) (= q_back q_front) (<= s 0)), 62163#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:38:27,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:38:27,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:27,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:38:27,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2394, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:38:27,692 INFO L87 Difference]: Start difference. First operand 167 states and 357 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 21:38:28,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:28,791 INFO L93 Difference]: Finished difference Result 205 states and 417 transitions. [2022-03-15 21:38:28,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:38:28,792 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 23 [2022-03-15 21:38:28,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:28,792 INFO L225 Difference]: With dead ends: 205 [2022-03-15 21:38:28,792 INFO L226 Difference]: Without dead ends: 188 [2022-03-15 21:38:28,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=282, Invalid=4548, Unknown=0, NotChecked=0, Total=4830 [2022-03-15 21:38:28,793 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:28,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:38:28,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-15 21:38:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2022-03-15 21:38:28,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.144578313253012) internal successors, (356), 166 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 356 transitions. [2022-03-15 21:38:28,795 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 356 transitions. Word has length 23 [2022-03-15 21:38:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:28,795 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 356 transitions. [2022-03-15 21:38:28,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 21:38:28,795 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 356 transitions. [2022-03-15 21:38:28,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:28,795 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:28,795 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:28,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-15 21:38:29,011 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 21:38:29,011 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:29,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:29,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1022638133, now seen corresponding path program 92 times [2022-03-15 21:38:29,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:29,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684766560] [2022-03-15 21:38:29,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:29,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:29,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:29,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:29,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684766560] [2022-03-15 21:38:29,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684766560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:29,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568245640] [2022-03-15 21:38:29,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:38:29,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:29,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:29,388 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 21:38:29,388 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 21:38:29,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:38:29,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:29,415 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:38:29,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:30,008 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:38:30,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:38:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:30,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:30,983 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:30,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:38:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:31,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568245640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:31,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:31,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-03-15 21:38:31,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1389126383] [2022-03-15 21:38:31,508 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:31,509 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:31,514 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 59 transitions. [2022-03-15 21:38:31,514 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:32,159 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [62921#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 62920#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 62923#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 62922#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 62919#(and (<= 0 s) (= q_back q_front) (<= s 0)), 62924#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:38:32,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:38:32,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:32,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:38:32,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2394, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:38:32,160 INFO L87 Difference]: Start difference. First operand 167 states and 356 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 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 21:38:33,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:33,311 INFO L93 Difference]: Finished difference Result 203 states and 414 transitions. [2022-03-15 21:38:33,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:38:33,312 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 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 23 [2022-03-15 21:38:33,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:33,312 INFO L225 Difference]: With dead ends: 203 [2022-03-15 21:38:33,312 INFO L226 Difference]: Without dead ends: 188 [2022-03-15 21:38:33,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=299, Invalid=4671, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:38:33,313 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:33,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 15 Invalid, 1270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:38:33,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-03-15 21:38:33,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 167. [2022-03-15 21:38:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.13855421686747) internal successors, (355), 166 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:33,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 355 transitions. [2022-03-15 21:38:33,315 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 355 transitions. Word has length 23 [2022-03-15 21:38:33,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:33,315 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 355 transitions. [2022-03-15 21:38:33,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 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 21:38:33,315 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 355 transitions. [2022-03-15 21:38:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:33,315 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:33,315 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:33,331 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 21:38:33,530 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 21:38:33,531 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:33,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1697516399, now seen corresponding path program 93 times [2022-03-15 21:38:33,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:33,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182434469] [2022-03-15 21:38:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:33,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:33,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:33,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182434469] [2022-03-15 21:38:33,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182434469] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:33,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693105722] [2022-03-15 21:38:33,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:38:33,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:33,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:33,856 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 21:38:33,857 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 21:38:33,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:38:33,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:33,886 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-15 21:38:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:38:34,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:38:34,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 38 [2022-03-15 21:38:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:34,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:35,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:38:35,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:38:35,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 45 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 21 case distinctions, treesize of input 119 treesize of output 279 [2022-03-15 21:38:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:36,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693105722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:36,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:36,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 48 [2022-03-15 21:38:36,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1725539293] [2022-03-15 21:38:36,070 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:36,071 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:36,075 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 57 transitions. [2022-03-15 21:38:36,076 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:36,692 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [63685#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 63684#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 63687#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 63686#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 63688#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 63689#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:38:36,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:38:36,693 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:36,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:38:36,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=2680, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:38:36,693 INFO L87 Difference]: Start difference. First operand 167 states and 355 transitions. Second 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 21:38:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:37,819 INFO L93 Difference]: Finished difference Result 202 states and 413 transitions. [2022-03-15 21:38:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:38:37,820 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 23 [2022-03-15 21:38:37,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:37,820 INFO L225 Difference]: With dead ends: 202 [2022-03-15 21:38:37,820 INFO L226 Difference]: Without dead ends: 189 [2022-03-15 21:38:37,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=672, Invalid=5180, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:38:37,821 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:37,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 13 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:37,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-15 21:38:37,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 167. [2022-03-15 21:38:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1325301204819276) internal successors, (354), 166 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:37,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 354 transitions. [2022-03-15 21:38:37,823 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 354 transitions. Word has length 23 [2022-03-15 21:38:37,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:37,823 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 354 transitions. [2022-03-15 21:38:37,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has 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 21:38:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 354 transitions. [2022-03-15 21:38:37,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:37,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:37,823 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:37,838 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 21:38:38,023 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 21:38:38,024 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1026550005, now seen corresponding path program 94 times [2022-03-15 21:38:38,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:38,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493804578] [2022-03-15 21:38:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:38,337 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:38,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:38,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493804578] [2022-03-15 21:38:38,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493804578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:38,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833367163] [2022-03-15 21:38:38,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:38:38,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:38,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:38,338 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 21:38:38,339 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 21:38:38,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:38:38,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:38,365 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:38:38,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:38,968 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:38:38,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:38:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:39,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:39,954 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:39,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:38:40,397 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:40,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833367163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:40,397 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:40,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-03-15 21:38:40,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [85238282] [2022-03-15 21:38:40,397 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:40,398 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:40,403 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 55 transitions. [2022-03-15 21:38:40,403 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:40,963 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [64446#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 64450#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 64447#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 64449#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 64445#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 64448#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:38:40,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:38:40,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:38:40,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2394, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:38:40,964 INFO L87 Difference]: Start difference. First operand 167 states and 354 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) 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 21:38:42,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:42,139 INFO L93 Difference]: Finished difference Result 201 states and 412 transitions. [2022-03-15 21:38:42,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:38:42,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) 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 23 [2022-03-15 21:38:42,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:42,140 INFO L225 Difference]: With dead ends: 201 [2022-03-15 21:38:42,140 INFO L226 Difference]: Without dead ends: 190 [2022-03-15 21:38:42,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=329, Invalid=4927, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:38:42,141 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:42,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 10 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-03-15 21:38:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 167. [2022-03-15 21:38:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1265060240963853) internal successors, (353), 166 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 353 transitions. [2022-03-15 21:38:42,143 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 353 transitions. Word has length 23 [2022-03-15 21:38:42,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:42,143 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 353 transitions. [2022-03-15 21:38:42,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) 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 21:38:42,143 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 353 transitions. [2022-03-15 21:38:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:42,143 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:42,143 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:42,159 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 21:38:42,344 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 21:38:42,344 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:42,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:42,344 INFO L85 PathProgramCache]: Analyzing trace with hash 173621935, now seen corresponding path program 95 times [2022-03-15 21:38:42,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:42,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226664544] [2022-03-15 21:38:42,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:42,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:42,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:42,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:42,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226664544] [2022-03-15 21:38:42,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226664544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:42,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668669881] [2022-03-15 21:38:42,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:38:42,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:42,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:42,684 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 21:38:42,685 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 21:38:42,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:38:42,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:42,714 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:38:42,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:43,325 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 21:38:43,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 28 [2022-03-15 21:38:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:43,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:44,354 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:44,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 121 treesize of output 401 [2022-03-15 21:38:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:44,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668669881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:44,981 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:44,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-03-15 21:38:44,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [722246897] [2022-03-15 21:38:44,981 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:44,982 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:44,986 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 53 transitions. [2022-03-15 21:38:44,987 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:45,507 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [65208#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 65207#(and (<= 0 s) (= q_back q_front) (<= s 0)), 65212#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 65211#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 65210#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 65209#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:38:45,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:38:45,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:45,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:38:45,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2392, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:38:45,507 INFO L87 Difference]: Start difference. First operand 167 states and 353 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) 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 21:38:46,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:46,717 INFO L93 Difference]: Finished difference Result 200 states and 411 transitions. [2022-03-15 21:38:46,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:38:46,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) 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 23 [2022-03-15 21:38:46,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:46,717 INFO L225 Difference]: With dead ends: 200 [2022-03-15 21:38:46,717 INFO L226 Difference]: Without dead ends: 191 [2022-03-15 21:38:46,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=347, Invalid=5055, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:38:46,718 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:46,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 9 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-15 21:38:46,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 167. [2022-03-15 21:38:46,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.1204819277108435) internal successors, (352), 166 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:46,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 352 transitions. [2022-03-15 21:38:46,720 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 352 transitions. Word has length 23 [2022-03-15 21:38:46,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:46,720 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 352 transitions. [2022-03-15 21:38:46,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) 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 21:38:46,720 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 352 transitions. [2022-03-15 21:38:46,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:46,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:46,721 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:46,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-15 21:38:46,921 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 21:38:46,921 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:46,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1239365195, now seen corresponding path program 96 times [2022-03-15 21:38:46,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:46,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027644573] [2022-03-15 21:38:46,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:46,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:46,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:47,229 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:38:47,229 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:47,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027644573] [2022-03-15 21:38:47,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027644573] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:47,229 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703363544] [2022-03-15 21:38:47,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:38:47,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:47,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:47,230 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 21:38:47,239 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 21:38:47,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:38:47,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:47,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-15 21:38:47,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:47,773 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 21:38:47,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 38 [2022-03-15 21:38:47,891 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:47,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:48,780 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:48,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:38:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:49,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703363544] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:49,384 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:49,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 43 [2022-03-15 21:38:49,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [873228069] [2022-03-15 21:38:49,384 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:49,385 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:49,389 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 51 transitions. [2022-03-15 21:38:49,389 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:49,892 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [65974#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 65975#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 65970#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 65971#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 65972#(and (<= 0 s) (= q_back q_front) (<= s 0)), 65973#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:38:49,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:38:49,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:49,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:38:49,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2395, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 21:38:49,893 INFO L87 Difference]: Start difference. First operand 167 states and 352 transitions. Second operand has 24 states, 23 states have (on average 1.826086956521739) 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 21:38:51,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:51,073 INFO L93 Difference]: Finished difference Result 199 states and 407 transitions. [2022-03-15 21:38:51,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:38:51,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.826086956521739) 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 23 [2022-03-15 21:38:51,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:51,074 INFO L225 Difference]: With dead ends: 199 [2022-03-15 21:38:51,074 INFO L226 Difference]: Without dead ends: 192 [2022-03-15 21:38:51,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1402 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=350, Invalid=5200, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:38:51,075 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:51,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 6 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:38:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-15 21:38:51,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 156. [2022-03-15 21:38:51,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.1354838709677417) internal successors, (331), 155 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:51,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 331 transitions. [2022-03-15 21:38:51,077 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 331 transitions. Word has length 23 [2022-03-15 21:38:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:51,077 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 331 transitions. [2022-03-15 21:38:51,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.826086956521739) 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 21:38:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 331 transitions. [2022-03-15 21:38:51,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:51,077 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:51,078 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:51,099 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 21:38:51,294 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 21:38:51,294 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:51,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:51,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1135810711, now seen corresponding path program 97 times [2022-03-15 21:38:51,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:51,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627625464] [2022-03-15 21:38:51,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:51,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:51,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:51,682 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:51,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:51,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627625464] [2022-03-15 21:38:51,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627625464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:51,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597952695] [2022-03-15 21:38:51,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:38:51,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:51,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:51,683 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 21:38:51,684 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 21:38:51,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:51,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:38:51,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:52,322 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:38:52,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:38:52,416 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:52,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:53,310 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:53,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:38:53,806 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:53,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597952695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:53,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:53,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-03-15 21:38:53,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1287259230] [2022-03-15 21:38:53,806 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:53,808 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:53,813 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 73 transitions. [2022-03-15 21:38:53,813 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:54,778 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [66715#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 66713#(and (<= N 6) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (<= 6 N) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1)), 66714#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (<= 6 N) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1)), 66717#(and (<= 0 s) (= q_back q_front) (<= s 0)), 66719#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 66720#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 66718#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 66716#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:38:54,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:38:54,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:38:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2700, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:38:54,779 INFO L87 Difference]: Start difference. First operand 156 states and 331 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 21:38:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:38:56,145 INFO L93 Difference]: Finished difference Result 212 states and 427 transitions. [2022-03-15 21:38:56,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:38:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 23 [2022-03-15 21:38:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:38:56,146 INFO L225 Difference]: With dead ends: 212 [2022-03-15 21:38:56,146 INFO L226 Difference]: Without dead ends: 209 [2022-03-15 21:38:56,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=312, Invalid=5540, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:38:56,147 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:38:56,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 20 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:38:56,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-15 21:38:56,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 162. [2022-03-15 21:38:56,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.1180124223602483) internal successors, (341), 161 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:38:56,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 341 transitions. [2022-03-15 21:38:56,149 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 341 transitions. Word has length 23 [2022-03-15 21:38:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:38:56,149 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 341 transitions. [2022-03-15 21:38:56,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 21:38:56,149 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 341 transitions. [2022-03-15 21:38:56,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:38:56,150 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:38:56,150 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:38:56,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-15 21:38:56,370 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 21:38:56,370 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:38:56,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:38:56,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1153762641, now seen corresponding path program 98 times [2022-03-15 21:38:56,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:38:56,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812481534] [2022-03-15 21:38:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:38:56,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:38:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:38:56,732 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:56,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:38:56,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812481534] [2022-03-15 21:38:56,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812481534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:38:56,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727219073] [2022-03-15 21:38:56,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:38:56,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:38:56,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:38:56,733 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 21:38:56,733 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 21:38:56,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:38:56,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:38:56,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:38:56,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:38:57,350 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:38:57,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:38:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:57,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:38:58,343 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:38:58,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:38:58,928 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:38:58,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727219073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:38:58,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:38:58,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-03-15 21:38:58,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1051174913] [2022-03-15 21:38:58,929 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:38:58,930 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:38:58,935 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 65 transitions. [2022-03-15 21:38:58,935 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:38:59,709 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [67487#(and (<= 0 s) (= q_back q_front) (<= s 0)), 67481#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (<= 6 N) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1)), 67485#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 67484#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 67486#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 67482#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 67483#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:38:59,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:38:59,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:38:59,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:38:59,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2597, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:38:59,710 INFO L87 Difference]: Start difference. First operand 162 states and 341 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 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 21:39:01,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:01,008 INFO L93 Difference]: Finished difference Result 222 states and 448 transitions. [2022-03-15 21:39:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:39:01,009 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 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 23 [2022-03-15 21:39:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:01,009 INFO L225 Difference]: With dead ends: 222 [2022-03-15 21:39:01,009 INFO L226 Difference]: Without dead ends: 193 [2022-03-15 21:39:01,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=303, Invalid=5247, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:39:01,010 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:01,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 16 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:39:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-15 21:39:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 161. [2022-03-15 21:39:01,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.11875) internal successors, (339), 160 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 339 transitions. [2022-03-15 21:39:01,012 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 339 transitions. Word has length 23 [2022-03-15 21:39:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:01,012 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 339 transitions. [2022-03-15 21:39:01,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 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 21:39:01,012 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 339 transitions. [2022-03-15 21:39:01,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:39:01,012 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:01,012 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:01,030 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 21:39:01,227 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 21:39:01,227 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:01,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:01,228 INFO L85 PathProgramCache]: Analyzing trace with hash 600152407, now seen corresponding path program 99 times [2022-03-15 21:39:01,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:01,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411584339] [2022-03-15 21:39:01,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:01,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:01,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:01,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:01,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411584339] [2022-03-15 21:39:01,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411584339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:01,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492576588] [2022-03-15 21:39:01,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:39:01,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:01,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:01,567 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 21:39:01,568 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 21:39:01,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:39:01,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:01,596 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-15 21:39:01,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:02,204 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 21:39:02,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 38 [2022-03-15 21:39:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:02,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:03,191 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:39:03,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:39:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:03,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492576588] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:03,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:03,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-03-15 21:39:03,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1906836368] [2022-03-15 21:39:03,806 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:03,807 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:03,812 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 63 transitions. [2022-03-15 21:39:03,812 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:04,565 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [68259#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 68256#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 68255#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 68260#(and (<= 0 s) (= q_back q_front) (<= s 0)), 68257#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 68258#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 68254#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (<= 6 N) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1))] [2022-03-15 21:39:04,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:39:04,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:04,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:39:04,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2597, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:39:04,566 INFO L87 Difference]: Start difference. First operand 161 states and 339 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 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 21:39:05,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:05,962 INFO L93 Difference]: Finished difference Result 234 states and 474 transitions. [2022-03-15 21:39:05,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:39:05,962 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 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 23 [2022-03-15 21:39:05,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:05,963 INFO L225 Difference]: With dead ends: 234 [2022-03-15 21:39:05,963 INFO L226 Difference]: Without dead ends: 209 [2022-03-15 21:39:05,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=325, Invalid=5527, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:39:05,964 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 25 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:05,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 14 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:39:05,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-15 21:39:05,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 160. [2022-03-15 21:39:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.119496855345912) internal successors, (337), 159 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 337 transitions. [2022-03-15 21:39:05,966 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 337 transitions. Word has length 23 [2022-03-15 21:39:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:05,966 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 337 transitions. [2022-03-15 21:39:05,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 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 21:39:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 337 transitions. [2022-03-15 21:39:05,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:39:05,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:05,967 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:05,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-15 21:39:06,167 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 21:39:06,167 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:06,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:06,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1275030673, now seen corresponding path program 100 times [2022-03-15 21:39:06,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:06,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108015246] [2022-03-15 21:39:06,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:06,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:06,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:06,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108015246] [2022-03-15 21:39:06,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108015246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:06,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327055430] [2022-03-15 21:39:06,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:39:06,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:06,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:06,515 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 21:39:06,516 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 21:39:06,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:39:06,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:06,543 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:39:06,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:07,143 INFO L353 Elim1Store]: treesize reduction 180, result has 0.6 percent of original size [2022-03-15 21:39:07,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 86 treesize of output 38 [2022-03-15 21:39:07,233 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:07,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:08,125 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:39:08,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:39:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:08,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327055430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:08,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:08,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-03-15 21:39:08,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [704274484] [2022-03-15 21:39:08,530 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:08,531 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:08,536 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 61 transitions. [2022-03-15 21:39:08,536 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:09,243 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [69045#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 69043#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 69044#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 69046#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 69047#(and (<= 0 s) (= q_back q_front) (<= s 0)), 69042#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 69041#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (<= 6 N) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1))] [2022-03-15 21:39:09,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:39:09,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:09,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:39:09,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2597, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:39:09,243 INFO L87 Difference]: Start difference. First operand 160 states and 337 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 25 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 21:39:10,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:10,710 INFO L93 Difference]: Finished difference Result 249 states and 506 transitions. [2022-03-15 21:39:10,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:39:10,710 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 25 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 23 [2022-03-15 21:39:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:10,710 INFO L225 Difference]: With dead ends: 249 [2022-03-15 21:39:10,710 INFO L226 Difference]: Without dead ends: 228 [2022-03-15 21:39:10,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=347, Invalid=5815, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 21:39:10,711 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1359 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:10,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 13 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1359 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:39:10,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-15 21:39:10,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 159. [2022-03-15 21:39:10,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.1202531645569622) internal successors, (335), 158 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:10,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 335 transitions. [2022-03-15 21:39:10,713 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 335 transitions. Word has length 23 [2022-03-15 21:39:10,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:10,713 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 335 transitions. [2022-03-15 21:39:10,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 25 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 21:39:10,713 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 335 transitions. [2022-03-15 21:39:10,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:39:10,713 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:10,713 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:10,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-15 21:39:10,913 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 21:39:10,914 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:10,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:10,914 INFO L85 PathProgramCache]: Analyzing trace with hash 604064279, now seen corresponding path program 101 times [2022-03-15 21:39:10,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:10,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767806244] [2022-03-15 21:39:10,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:10,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:11,275 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:11,276 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:11,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767806244] [2022-03-15 21:39:11,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767806244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:11,276 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464533171] [2022-03-15 21:39:11,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:39:11,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:11,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:11,277 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 21:39:11,277 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 21:39:11,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:39:11,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:11,307 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 90 conjunts are in the unsatisfiable core [2022-03-15 21:39:11,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:11,965 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 21:39:11,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 167 treesize of output 83 [2022-03-15 21:39:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:12,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:13,187 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:39:13,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 149 treesize of output 413 [2022-03-15 21:39:13,846 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:13,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464533171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:13,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:13,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 46 [2022-03-15 21:39:13,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2115086178] [2022-03-15 21:39:13,847 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:13,848 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:13,853 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 59 transitions. [2022-03-15 21:39:13,853 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:14,529 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [69850#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 69852#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 69853#(and (<= 0 s) (= q_back q_front) (<= s 0)), 69847#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (<= 6 N) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1)), 69849#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 69848#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 69851#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:39:14,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:39:14,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:14,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:39:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2795, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:39:14,530 INFO L87 Difference]: Start difference. First operand 159 states and 335 transitions. Second operand has 26 states, 25 states have (on average 1.88) 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 21:39:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:16,078 INFO L93 Difference]: Finished difference Result 267 states and 544 transitions. [2022-03-15 21:39:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:39:16,078 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) 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 23 [2022-03-15 21:39:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:16,079 INFO L225 Difference]: With dead ends: 267 [2022-03-15 21:39:16,079 INFO L226 Difference]: Without dead ends: 250 [2022-03-15 21:39:16,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1733 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=389, Invalid=6417, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:39:16,079 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 1268 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:16,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 10 Invalid, 1354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1268 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:39:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-15 21:39:16,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 158. [2022-03-15 21:39:16,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.121019108280255) internal successors, (333), 157 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 333 transitions. [2022-03-15 21:39:16,081 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 333 transitions. Word has length 23 [2022-03-15 21:39:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:16,082 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 333 transitions. [2022-03-15 21:39:16,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) 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 21:39:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 333 transitions. [2022-03-15 21:39:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:39:16,082 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:16,082 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:16,098 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 21:39:16,287 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 21:39:16,287 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:16,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:16,288 INFO L85 PathProgramCache]: Analyzing trace with hash -248863791, now seen corresponding path program 102 times [2022-03-15 21:39:16,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:16,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122067518] [2022-03-15 21:39:16,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:16,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:16,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:16,670 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:16,670 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:16,670 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122067518] [2022-03-15 21:39:16,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122067518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:16,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132405407] [2022-03-15 21:39:16,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:39:16,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:16,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:16,672 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 21:39:16,673 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 21:39:16,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-15 21:39:16,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:16,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-15 21:39:16,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:17,309 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 21:39:17,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 38 [2022-03-15 21:39:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:17,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:18,301 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:39:18,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:39:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:18,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132405407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:18,732 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:18,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-03-15 21:39:18,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [177997721] [2022-03-15 21:39:18,732 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:18,733 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:18,738 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 57 transitions. [2022-03-15 21:39:18,738 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:19,374 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [70673#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 70676#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 70675#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 70677#(and (<= 0 s) (= q_back q_front) (<= s 0)), 70672#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 70674#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 70671#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (<= 6 N) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1))] [2022-03-15 21:39:19,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:39:19,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:19,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:39:19,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=2597, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:39:19,375 INFO L87 Difference]: Start difference. First operand 158 states and 333 transitions. Second operand has 26 states, 25 states have (on average 1.84) 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 21:39:20,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:20,956 INFO L93 Difference]: Finished difference Result 289 states and 611 transitions. [2022-03-15 21:39:20,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:39:20,957 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.84) 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 23 [2022-03-15 21:39:20,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:20,957 INFO L225 Difference]: With dead ends: 289 [2022-03-15 21:39:20,957 INFO L226 Difference]: Without dead ends: 275 [2022-03-15 21:39:20,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=391, Invalid=6415, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:39:20,958 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:20,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 8 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:39:20,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-15 21:39:20,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 157. [2022-03-15 21:39:20,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.121794871794872) internal successors, (331), 156 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:20,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 331 transitions. [2022-03-15 21:39:20,962 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 331 transitions. Word has length 23 [2022-03-15 21:39:20,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:20,962 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 331 transitions. [2022-03-15 21:39:20,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.84) 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 21:39:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 331 transitions. [2022-03-15 21:39:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 21:39:20,962 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:20,962 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:20,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:21,175 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 21:39:21,176 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:21,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1661850921, now seen corresponding path program 103 times [2022-03-15 21:39:21,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:21,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681182185] [2022-03-15 21:39:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:21,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:21,529 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:21,529 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:21,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681182185] [2022-03-15 21:39:21,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681182185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:21,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445031396] [2022-03-15 21:39:21,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:39:21,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:21,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:21,530 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 21:39:21,534 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 21:39:21,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:21,560 WARN L261 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 82 conjunts are in the unsatisfiable core [2022-03-15 21:39:21,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:22,089 INFO L353 Elim1Store]: treesize reduction 170, result has 0.6 percent of original size [2022-03-15 21:39:22,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 82 treesize of output 38 [2022-03-15 21:39:22,213 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:22,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:23,121 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 21:39:23,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 116 treesize of output 398 [2022-03-15 21:39:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:23,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445031396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:23,518 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:23,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 44 [2022-03-15 21:39:23,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1292262625] [2022-03-15 21:39:23,518 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:23,520 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:23,524 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 55 transitions. [2022-03-15 21:39:23,524 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:24,162 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [71525#(and (<= 0 s) (= q_back q_front) (<= s 0)), 71521#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 71523#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 71522#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 71520#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 71519#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (<= 6 N) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1)), 71524#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:39:24,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:39:24,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:24,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:39:24,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2598, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:39:24,163 INFO L87 Difference]: Start difference. First operand 157 states and 331 transitions. Second operand has 26 states, 25 states have (on average 1.8) 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 21:39:25,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:25,829 INFO L93 Difference]: Finished difference Result 262 states and 532 transitions. [2022-03-15 21:39:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:39:25,829 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.8) 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 23 [2022-03-15 21:39:25,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:25,830 INFO L225 Difference]: With dead ends: 262 [2022-03-15 21:39:25,830 INFO L226 Difference]: Without dead ends: 255 [2022-03-15 21:39:25,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1788 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=403, Invalid=6737, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 21:39:25,830 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 1356 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:25,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 7 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1356 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:39:25,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-15 21:39:25,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 155. [2022-03-15 21:39:25,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.1233766233766236) internal successors, (327), 154 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 327 transitions. [2022-03-15 21:39:25,834 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 327 transitions. Word has length 23 [2022-03-15 21:39:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:25,834 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 327 transitions. [2022-03-15 21:39:25,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.8) 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 21:39:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 327 transitions. [2022-03-15 21:39:25,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:39:25,835 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:25,835 INFO L514 BasicCegarLoop]: trace histogram [8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:25,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:26,035 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 21:39:26,035 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash 850518597, now seen corresponding path program 104 times [2022-03-15 21:39:26,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:26,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642781221] [2022-03-15 21:39:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:26,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:26,088 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:26,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:26,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642781221] [2022-03-15 21:39:26,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642781221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:26,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203834239] [2022-03-15 21:39:26,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:39:26,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:26,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:26,090 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 21:39:26,090 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 21:39:26,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:39:26,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:26,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 21:39:26,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:26,151 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:26,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:26,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203834239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:26,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:26,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-03-15 21:39:26,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [934129410] [2022-03-15 21:39:26,187 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:26,189 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:26,195 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 76 transitions. [2022-03-15 21:39:26,195 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:26,323 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:39:26,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:39:26,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:26,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:39:26,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:39:26,323 INFO L87 Difference]: Start difference. First operand 155 states and 327 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 21:39:26,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:26,390 INFO L93 Difference]: Finished difference Result 305 states and 608 transitions. [2022-03-15 21:39:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:39:26,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 21:39:26,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:26,391 INFO L225 Difference]: With dead ends: 305 [2022-03-15 21:39:26,391 INFO L226 Difference]: Without dead ends: 286 [2022-03-15 21:39:26,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-15 21:39:26,391 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 57 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:26,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 2 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:39:26,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-03-15 21:39:26,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 174. [2022-03-15 21:39:26,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 2.138728323699422) internal successors, (370), 173 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:26,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 370 transitions. [2022-03-15 21:39:26,393 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 370 transitions. Word has length 24 [2022-03-15 21:39:26,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:26,393 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 370 transitions. [2022-03-15 21:39:26,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 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 21:39:26,394 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 370 transitions. [2022-03-15 21:39:26,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:39:26,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:26,394 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:26,410 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 21:39:26,594 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 21:39:26,594 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:26,595 INFO L85 PathProgramCache]: Analyzing trace with hash -503129524, now seen corresponding path program 105 times [2022-03-15 21:39:26,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:26,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556455444] [2022-03-15 21:39:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:26,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:26,675 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:26,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:26,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556455444] [2022-03-15 21:39:26,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556455444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:26,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068834198] [2022-03-15 21:39:26,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:39:26,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:26,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:26,676 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 21:39:26,679 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 21:39:26,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:39:26,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:26,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 21:39:26,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:26,774 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:26,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:26,793 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 21:39:26,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 21:39:26,839 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:26,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068834198] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:26,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:26,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 12 [2022-03-15 21:39:26,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [331093029] [2022-03-15 21:39:26,840 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:26,841 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:26,846 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 56 transitions. [2022-03-15 21:39:26,847 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:26,940 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:39:26,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:39:26,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:26,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:39:26,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:39:26,941 INFO L87 Difference]: Start difference. First operand 174 states and 370 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 21:39:27,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:27,396 INFO L93 Difference]: Finished difference Result 446 states and 902 transitions. [2022-03-15 21:39:27,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:39:27,396 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 21:39:27,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:27,397 INFO L225 Difference]: With dead ends: 446 [2022-03-15 21:39:27,397 INFO L226 Difference]: Without dead ends: 446 [2022-03-15 21:39:27,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:39:27,397 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 69 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:27,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 19 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:39:27,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-03-15 21:39:27,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 230. [2022-03-15 21:39:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.349344978165939) internal successors, (538), 229 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 538 transitions. [2022-03-15 21:39:27,400 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 538 transitions. Word has length 24 [2022-03-15 21:39:27,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:27,400 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 538 transitions. [2022-03-15 21:39:27,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 21:39:27,400 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 538 transitions. [2022-03-15 21:39:27,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:39:27,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:27,401 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:27,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:27,601 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 21:39:27,601 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:27,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:27,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1765164260, now seen corresponding path program 106 times [2022-03-15 21:39:27,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:27,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832442654] [2022-03-15 21:39:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:27,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:27,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:27,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832442654] [2022-03-15 21:39:27,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832442654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:27,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865802737] [2022-03-15 21:39:27,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:39:27,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:27,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:27,696 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 21:39:27,696 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 21:39:27,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:39:27,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:27,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 21:39:27,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:27,791 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:27,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:27,821 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:39:27,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:39:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:27,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865802737] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:27,865 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:27,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2022-03-15 21:39:27,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1015203676] [2022-03-15 21:39:27,866 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:27,867 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:27,872 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 58 transitions. [2022-03-15 21:39:27,872 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:27,973 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:39:27,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:39:27,973 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:27,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:39:27,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-03-15 21:39:27,973 INFO L87 Difference]: Start difference. First operand 230 states and 538 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 21:39:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:28,684 INFO L93 Difference]: Finished difference Result 847 states and 1739 transitions. [2022-03-15 21:39:28,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-15 21:39:28,684 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 21:39:28,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:28,686 INFO L225 Difference]: With dead ends: 847 [2022-03-15 21:39:28,686 INFO L226 Difference]: Without dead ends: 847 [2022-03-15 21:39:28,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=375, Invalid=2817, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:39:28,686 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 177 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:28,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 21 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:39:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2022-03-15 21:39:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 291. [2022-03-15 21:39:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.424137931034483) internal successors, (703), 290 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 703 transitions. [2022-03-15 21:39:28,695 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 703 transitions. Word has length 24 [2022-03-15 21:39:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:28,695 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 703 transitions. [2022-03-15 21:39:28,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 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 21:39:28,695 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 703 transitions. [2022-03-15 21:39:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:39:28,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:28,695 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:28,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:28,895 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 21:39:28,896 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash -932172468, now seen corresponding path program 107 times [2022-03-15 21:39:28,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:28,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018541666] [2022-03-15 21:39:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:28,987 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:28,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:28,987 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018541666] [2022-03-15 21:39:28,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018541666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:28,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472932934] [2022-03-15 21:39:28,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:39:28,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:28,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:28,989 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 21:39:28,989 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 21:39:29,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:39:29,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:29,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 21:39:29,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:29,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:29,126 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:39:29,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:39:29,168 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:29,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472932934] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:29,168 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:29,168 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 15 [2022-03-15 21:39:29,168 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [203580471] [2022-03-15 21:39:29,168 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:29,169 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:29,174 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 60 transitions. [2022-03-15 21:39:29,174 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:29,283 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:39:29,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:39:29,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:29,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:39:29,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:39:29,283 INFO L87 Difference]: Start difference. First operand 291 states and 703 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 21:39:30,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:30,525 INFO L93 Difference]: Finished difference Result 1697 states and 3563 transitions. [2022-03-15 21:39:30,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-15 21:39:30,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 21:39:30,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:30,528 INFO L225 Difference]: With dead ends: 1697 [2022-03-15 21:39:30,529 INFO L226 Difference]: Without dead ends: 1697 [2022-03-15 21:39:30,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3358 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=943, Invalid=8563, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 21:39:30,529 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 321 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:30,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 23 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:39:30,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1697 states. [2022-03-15 21:39:30,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1697 to 410. [2022-03-15 21:39:30,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.491442542787286) internal successors, (1019), 409 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1019 transitions. [2022-03-15 21:39:30,538 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1019 transitions. Word has length 24 [2022-03-15 21:39:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:30,538 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1019 transitions. [2022-03-15 21:39:30,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 21:39:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1019 transitions. [2022-03-15 21:39:30,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:39:30,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:30,538 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:30,555 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 21:39:30,754 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 21:39:30,754 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:30,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:30,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1349734884, now seen corresponding path program 108 times [2022-03-15 21:39:30,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:30,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914774886] [2022-03-15 21:39:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:30,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:30,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:30,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914774886] [2022-03-15 21:39:30,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914774886] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:30,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106894641] [2022-03-15 21:39:30,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:39:30,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:30,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:30,865 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 21:39:30,867 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 21:39:30,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:39:30,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:30,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 21:39:30,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:30,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:31,038 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:39:31,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:39:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:31,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106894641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:31,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:31,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 17 [2022-03-15 21:39:31,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [782667496] [2022-03-15 21:39:31,089 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:31,090 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:31,095 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 62 transitions. [2022-03-15 21:39:31,095 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:31,242 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:39:31,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:39:31,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:39:31,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:39:31,243 INFO L87 Difference]: Start difference. First operand 410 states and 1019 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 21:39:33,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:33,479 INFO L93 Difference]: Finished difference Result 3631 states and 7785 transitions. [2022-03-15 21:39:33,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-03-15 21:39:33,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 21:39:33,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:33,485 INFO L225 Difference]: With dead ends: 3631 [2022-03-15 21:39:33,485 INFO L226 Difference]: Without dead ends: 3631 [2022-03-15 21:39:33,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10516 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2239, Invalid=24167, Unknown=0, NotChecked=0, Total=26406 [2022-03-15 21:39:33,488 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 513 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:33,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [513 Valid, 25 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1242 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:39:33,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2022-03-15 21:39:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 619. [2022-03-15 21:39:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 2.546925566343042) internal successors, (1574), 618 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:33,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1574 transitions. [2022-03-15 21:39:33,524 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1574 transitions. Word has length 24 [2022-03-15 21:39:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:33,524 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1574 transitions. [2022-03-15 21:39:33,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 21:39:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1574 transitions. [2022-03-15 21:39:33,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:39:33,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:33,524 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:33,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-15 21:39:33,727 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 21:39:33,727 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:33,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:33,728 INFO L85 PathProgramCache]: Analyzing trace with hash -925581236, now seen corresponding path program 109 times [2022-03-15 21:39:33,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:33,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368035776] [2022-03-15 21:39:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:33,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:33,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:33,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368035776] [2022-03-15 21:39:33,863 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368035776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:33,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105385702] [2022-03-15 21:39:33,863 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:39:33,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:33,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:33,864 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 21:39:33,865 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 21:39:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:33,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 21:39:33,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:33,986 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:33,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:34,060 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:39:34,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:39:34,100 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:34,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105385702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:34,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:34,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 19 [2022-03-15 21:39:34,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [538336364] [2022-03-15 21:39:34,100 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:34,102 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:34,107 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 64 transitions. [2022-03-15 21:39:34,107 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:34,245 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:39:34,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:39:34,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:34,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:39:34,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2022-03-15 21:39:34,245 INFO L87 Difference]: Start difference. First operand 619 states and 1574 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:39:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:38,231 INFO L93 Difference]: Finished difference Result 6925 states and 15129 transitions. [2022-03-15 21:39:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2022-03-15 21:39:38,231 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:39:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:38,243 INFO L225 Difference]: With dead ends: 6925 [2022-03-15 21:39:38,243 INFO L226 Difference]: Without dead ends: 6925 [2022-03-15 21:39:38,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 57 SyntacticMatches, 7 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28999 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4959, Invalid=62381, Unknown=0, NotChecked=0, Total=67340 [2022-03-15 21:39:38,246 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 746 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:38,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 27 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:39:38,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2022-03-15 21:39:38,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 958. [2022-03-15 21:39:38,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.595611285266458) internal successors, (2484), 957 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:38,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2484 transitions. [2022-03-15 21:39:38,282 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2484 transitions. Word has length 24 [2022-03-15 21:39:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:38,282 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 2484 transitions. [2022-03-15 21:39:38,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 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 21:39:38,282 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2484 transitions. [2022-03-15 21:39:38,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:39:38,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:38,283 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:38,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:38,499 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 21:39:38,499 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1554063076, now seen corresponding path program 110 times [2022-03-15 21:39:38,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:38,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203099491] [2022-03-15 21:39:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:38,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:38,664 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:38,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203099491] [2022-03-15 21:39:38,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203099491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:38,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907341239] [2022-03-15 21:39:38,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:39:38,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:38,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:38,665 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 21:39:38,666 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 21:39:38,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:39:38,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 21:39:38,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:38,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:38,841 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:39:38,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:39:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:38,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907341239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:38,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:38,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2022-03-15 21:39:38,877 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [271779374] [2022-03-15 21:39:38,878 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:38,879 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:38,884 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 66 transitions. [2022-03-15 21:39:38,884 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:39,043 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:39:39,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 21:39:39,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 21:39:39,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2022-03-15 21:39:39,043 INFO L87 Difference]: Start difference. First operand 958 states and 2484 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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 21:39:39,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:39,588 INFO L93 Difference]: Finished difference Result 1744 states and 3566 transitions. [2022-03-15 21:39:39,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:39:39,589 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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 21:39:39,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:39,591 INFO L225 Difference]: With dead ends: 1744 [2022-03-15 21:39:39,591 INFO L226 Difference]: Without dead ends: 1744 [2022-03-15 21:39:39,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=371, Invalid=1885, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 21:39:39,592 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 120 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:39,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 29 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:39:39,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1744 states. [2022-03-15 21:39:39,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1744 to 183. [2022-03-15 21:39:39,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.131868131868132) internal successors, (388), 182 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 388 transitions. [2022-03-15 21:39:39,598 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 388 transitions. Word has length 24 [2022-03-15 21:39:39,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:39,598 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 388 transitions. [2022-03-15 21:39:39,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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 21:39:39,598 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 388 transitions. [2022-03-15 21:39:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:39:39,598 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:39,599 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:39,615 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-15 21:39:39,799 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 21:39:39,799 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:39,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:39,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1113625420, now seen corresponding path program 111 times [2022-03-15 21:39:39,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:39,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82332544] [2022-03-15 21:39:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:39,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:39,954 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 21:39:39,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:39,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82332544] [2022-03-15 21:39:39,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82332544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:39,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545689073] [2022-03-15 21:39:39,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:39:39,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:39,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:39,956 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 21:39:39,956 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 21:39:39,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:39:39,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:39,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 21:39:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:40,219 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 21:39:40,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:40,271 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:39:40,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:39:40,312 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 21:39:40,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545689073] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:40,312 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:40,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-03-15 21:39:40,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1414690885] [2022-03-15 21:39:40,312 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:40,314 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:40,328 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 78 transitions. [2022-03-15 21:39:40,329 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:40,543 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:39:40,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 21:39:40,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:40,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 21:39:40,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=904, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:39:40,543 INFO L87 Difference]: Start difference. First operand 183 states and 388 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 21:39:41,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:41,229 INFO L93 Difference]: Finished difference Result 696 states and 1446 transitions. [2022-03-15 21:39:41,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:39:41,229 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 21:39:41,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:41,230 INFO L225 Difference]: With dead ends: 696 [2022-03-15 21:39:41,230 INFO L226 Difference]: Without dead ends: 696 [2022-03-15 21:39:41,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=428, Invalid=2994, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:39:41,231 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 115 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:41,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 19 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:39:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-15 21:39:41,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 201. [2022-03-15 21:39:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.15) internal successors, (430), 200 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:41,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 430 transitions. [2022-03-15 21:39:41,234 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 430 transitions. Word has length 24 [2022-03-15 21:39:41,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:41,234 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 430 transitions. [2022-03-15 21:39:41,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 21:39:41,234 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 430 transitions. [2022-03-15 21:39:41,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:39:41,234 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:41,234 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:41,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-03-15 21:39:41,455 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 21:39:41,455 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:41,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1582978864, now seen corresponding path program 112 times [2022-03-15 21:39:41,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:41,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399212744] [2022-03-15 21:39:41,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:41,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:41,785 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:41,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399212744] [2022-03-15 21:39:41,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399212744] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:41,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400391118] [2022-03-15 21:39:41,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:39:41,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:41,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:41,787 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 21:39:41,788 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 21:39:41,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:39:41,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:41,817 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:39:41,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:42,509 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:39:42,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:39:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:42,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:43,793 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:39:43,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:39:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:44,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400391118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:44,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:44,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19] total 44 [2022-03-15 21:39:44,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1899725334] [2022-03-15 21:39:44,539 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:44,540 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:44,553 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 59 transitions. [2022-03-15 21:39:44,553 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:45,189 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [97190#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 97191#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 97194#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 97192#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 97196#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 97193#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 97195#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:39:45,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:39:45,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:45,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:39:45,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2579, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 21:39:45,190 INFO L87 Difference]: Start difference. First operand 201 states and 430 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 21:39:46,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:46,140 INFO L93 Difference]: Finished difference Result 238 states and 491 transitions. [2022-03-15 21:39:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-15 21:39:46,140 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 25 [2022-03-15 21:39:46,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:46,141 INFO L225 Difference]: With dead ends: 238 [2022-03-15 21:39:46,141 INFO L226 Difference]: Without dead ends: 229 [2022-03-15 21:39:46,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=316, Invalid=4654, Unknown=0, NotChecked=0, Total=4970 [2022-03-15 21:39:46,141 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:46,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 8 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:39:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-15 21:39:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 202. [2022-03-15 21:39:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1492537313432836) internal successors, (432), 201 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 432 transitions. [2022-03-15 21:39:46,144 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 432 transitions. Word has length 25 [2022-03-15 21:39:46,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:46,144 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 432 transitions. [2022-03-15 21:39:46,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 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 21:39:46,144 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 432 transitions. [2022-03-15 21:39:46,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:39:46,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:46,144 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:46,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-15 21:39:46,344 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 21:39:46,345 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:46,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash 169991734, now seen corresponding path program 113 times [2022-03-15 21:39:46,345 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:46,345 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432477634] [2022-03-15 21:39:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:46,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:46,631 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:46,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:46,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432477634] [2022-03-15 21:39:46,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432477634] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:46,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757272729] [2022-03-15 21:39:46,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:39:46,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:46,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:46,633 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 21:39:46,633 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 21:39:46,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:39:46,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:46,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-15 21:39:46,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:47,311 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:39:47,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:39:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:47,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:48,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,150 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:39:48,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:39:48,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 141 treesize of output 379 [2022-03-15 21:39:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:48,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757272729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:48,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:48,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19] total 47 [2022-03-15 21:39:48,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2145122505] [2022-03-15 21:39:48,707 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:48,708 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:48,714 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 57 transitions. [2022-03-15 21:39:48,714 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:49,328 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [98072#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 98070#(and (<= 0 s) (= q_back q_front) (<= s 0)), 98069#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 98068#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 98071#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 98074#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 98073#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:39:49,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 21:39:49,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:49,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 21:39:49,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2685, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:39:49,329 INFO L87 Difference]: Start difference. First operand 202 states and 432 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 21:39:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:50,248 INFO L93 Difference]: Finished difference Result 239 states and 491 transitions. [2022-03-15 21:39:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:39:50,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 25 [2022-03-15 21:39:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:50,248 INFO L225 Difference]: With dead ends: 239 [2022-03-15 21:39:50,248 INFO L226 Difference]: Without dead ends: 232 [2022-03-15 21:39:50,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1729 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=663, Invalid=4887, Unknown=0, NotChecked=0, Total=5550 [2022-03-15 21:39:50,249 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:50,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:39:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-15 21:39:50,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 201. [2022-03-15 21:39:50,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.15) internal successors, (430), 200 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:50,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 430 transitions. [2022-03-15 21:39:50,251 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 430 transitions. Word has length 25 [2022-03-15 21:39:50,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:50,251 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 430 transitions. [2022-03-15 21:39:50,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 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 21:39:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 430 transitions. [2022-03-15 21:39:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:39:50,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:50,252 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:50,270 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 21:39:50,452 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 21:39:50,452 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:50,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:50,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1114357864, now seen corresponding path program 114 times [2022-03-15 21:39:50,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:50,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512322004] [2022-03-15 21:39:50,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:50,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:50,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:50,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:50,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512322004] [2022-03-15 21:39:50,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512322004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:50,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061049103] [2022-03-15 21:39:50,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:39:50,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:50,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:50,765 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 21:39:50,766 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 21:39:50,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:39:50,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:39:50,796 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-15 21:39:50,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:51,529 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-03-15 21:39:51,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 44 [2022-03-15 21:39:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:51,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:52,825 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:39:52,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:39:53,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:53,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061049103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:53,611 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:53,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 45 [2022-03-15 21:39:53,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1819780789] [2022-03-15 21:39:53,612 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:53,613 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:53,618 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 61 transitions. [2022-03-15 21:39:53,619 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:54,323 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [98947#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 98945#(and (<= 0 s) (= q_back q_front) (<= s 0)), 98949#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 98951#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 98950#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 98946#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 98948#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:39:54,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:39:54,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:54,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:39:54,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2685, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:39:54,324 INFO L87 Difference]: Start difference. First operand 201 states and 430 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) 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 21:39:55,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:39:55,434 INFO L93 Difference]: Finished difference Result 240 states and 494 transitions. [2022-03-15 21:39:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 21:39:55,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) 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 25 [2022-03-15 21:39:55,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:39:55,435 INFO L225 Difference]: With dead ends: 240 [2022-03-15 21:39:55,435 INFO L226 Difference]: Without dead ends: 229 [2022-03-15 21:39:55,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=319, Invalid=4937, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 21:39:55,435 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:39:55,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1232 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:39:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-15 21:39:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 202. [2022-03-15 21:39:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1492537313432836) internal successors, (432), 201 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:39:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 432 transitions. [2022-03-15 21:39:55,437 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 432 transitions. Word has length 25 [2022-03-15 21:39:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:39:55,437 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 432 transitions. [2022-03-15 21:39:55,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) 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 21:39:55,438 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 432 transitions. [2022-03-15 21:39:55,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:39:55,438 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:39:55,438 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:39:55,453 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 21:39:55,638 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 21:39:55,638 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:39:55,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:39:55,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1967285934, now seen corresponding path program 115 times [2022-03-15 21:39:55,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:39:55,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440058975] [2022-03-15 21:39:55,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:39:55,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:39:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:39:55,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:39:55,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440058975] [2022-03-15 21:39:55,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440058975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:39:55,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902597215] [2022-03-15 21:39:55,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:39:55,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:39:55,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:39:55,963 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 21:39:55,963 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 21:39:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:39:55,991 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:39:55,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:39:56,721 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:39:56,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:39:56,809 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:56,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:39:58,038 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:39:58,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:39:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:39:58,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902597215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:39:58,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:39:58,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 45 [2022-03-15 21:39:58,640 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1333660473] [2022-03-15 21:39:58,640 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:39:58,650 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:39:58,656 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 59 transitions. [2022-03-15 21:39:58,656 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:39:59,370 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [99827#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 99831#(and (<= 0 s) (= q_back q_front) (<= s 0)), 99826#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 99828#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 99830#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 99825#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 99829#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:39:59,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 21:39:59,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:39:59,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 21:39:59,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2685, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 21:39:59,385 INFO L87 Difference]: Start difference. First operand 202 states and 432 transitions. Second operand has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 21:40:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:00,474 INFO L93 Difference]: Finished difference Result 242 states and 499 transitions. [2022-03-15 21:40:00,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:40:00,474 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 25 [2022-03-15 21:40:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:00,474 INFO L225 Difference]: With dead ends: 242 [2022-03-15 21:40:00,474 INFO L226 Difference]: Without dead ends: 233 [2022-03-15 21:40:00,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=336, Invalid=5066, Unknown=0, NotChecked=0, Total=5402 [2022-03-15 21:40:00,475 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:00,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:40:00,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-15 21:40:00,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 203. [2022-03-15 21:40:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1485148514851486) internal successors, (434), 202 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:00,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 434 transitions. [2022-03-15 21:40:00,477 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 434 transitions. Word has length 25 [2022-03-15 21:40:00,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:00,477 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 434 transitions. [2022-03-15 21:40:00,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 21:40:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 434 transitions. [2022-03-15 21:40:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:00,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:00,478 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:00,496 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 21:40:00,696 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 21:40:00,696 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash 914694232, now seen corresponding path program 116 times [2022-03-15 21:40:00,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:00,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022022344] [2022-03-15 21:40:00,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:00,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:01,107 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:01,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:01,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022022344] [2022-03-15 21:40:01,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022022344] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:01,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071691475] [2022-03-15 21:40:01,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:40:01,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:01,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:01,109 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 21:40:01,109 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 21:40:01,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:40:01,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:01,138 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:40:01,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:01,809 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:40:01,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:40:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:01,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:03,225 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:40:03,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:40:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:04,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071691475] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:04,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:04,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 21:40:04,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [852282284] [2022-03-15 21:40:04,092 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:04,093 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:04,099 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 57 transitions. [2022-03-15 21:40:04,099 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:04,758 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [100718#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 100721#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 100719#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 100717#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 100716#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 100720#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 100722#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:40:04,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:40:04,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:04,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:40:04,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3225, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:40:04,759 INFO L87 Difference]: Start difference. First operand 203 states and 434 transitions. Second operand has 28 states, 27 states have (on average 1.7407407407407407) 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 21:40:06,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:06,339 INFO L93 Difference]: Finished difference Result 269 states and 564 transitions. [2022-03-15 21:40:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:40:06,339 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.7407407407407407) 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 25 [2022-03-15 21:40:06,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:06,340 INFO L225 Difference]: With dead ends: 269 [2022-03-15 21:40:06,340 INFO L226 Difference]: Without dead ends: 262 [2022-03-15 21:40:06,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=427, Invalid=7229, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 21:40:06,340 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:06,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 7 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1284 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:40:06,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-03-15 21:40:06,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 220. [2022-03-15 21:40:06,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.182648401826484) internal successors, (478), 219 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:06,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 478 transitions. [2022-03-15 21:40:06,342 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 478 transitions. Word has length 25 [2022-03-15 21:40:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:06,343 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 478 transitions. [2022-03-15 21:40:06,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.7407407407407407) 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 21:40:06,343 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 478 transitions. [2022-03-15 21:40:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:06,343 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:06,343 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:06,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-15 21:40:06,543 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 21:40:06,543 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:06,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1167549488, now seen corresponding path program 117 times [2022-03-15 21:40:06,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:06,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932582579] [2022-03-15 21:40:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:06,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:06,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:06,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:06,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932582579] [2022-03-15 21:40:06,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932582579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:06,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388111642] [2022-03-15 21:40:06,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:40:06,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:06,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:06,874 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 21:40:06,874 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 21:40:06,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:40:06,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:06,904 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-15 21:40:06,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:07,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:07,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:40:07,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 27 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 54 [2022-03-15 21:40:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:07,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:08,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:08,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:40:08,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 362 [2022-03-15 21:40:09,380 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:09,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388111642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:09,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:09,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 20, 20] total 51 [2022-03-15 21:40:09,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [112208286] [2022-03-15 21:40:09,380 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:09,381 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:09,387 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 63 transitions. [2022-03-15 21:40:09,387 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:10,122 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [101692#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 101688#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 101687#(and (<= 0 s) (= q_back q_front) (<= s 0)), 101693#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 101690#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 101689#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 101691#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:40:10,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:40:10,122 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:10,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:40:10,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=3065, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:40:10,123 INFO L87 Difference]: Start difference. First operand 220 states and 478 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 21:40:11,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:11,279 INFO L93 Difference]: Finished difference Result 262 states and 548 transitions. [2022-03-15 21:40:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-15 21:40:11,279 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 25 [2022-03-15 21:40:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:11,280 INFO L225 Difference]: With dead ends: 262 [2022-03-15 21:40:11,280 INFO L226 Difference]: Without dead ends: 249 [2022-03-15 21:40:11,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=746, Invalid=5574, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:40:11,280 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 1333 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:11,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1333 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:40:11,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-15 21:40:11,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 222. [2022-03-15 21:40:11,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.180995475113122) internal successors, (482), 221 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 482 transitions. [2022-03-15 21:40:11,282 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 482 transitions. Word has length 25 [2022-03-15 21:40:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:11,282 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 482 transitions. [2022-03-15 21:40:11,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 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 21:40:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 482 transitions. [2022-03-15 21:40:11,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:11,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:11,283 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:11,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-15 21:40:11,483 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 21:40:11,483 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:11,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash 496583094, now seen corresponding path program 118 times [2022-03-15 21:40:11,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:11,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797238347] [2022-03-15 21:40:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:11,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:11,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797238347] [2022-03-15 21:40:11,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797238347] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:11,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66505647] [2022-03-15 21:40:11,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:40:11,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:11,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:11,805 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 21:40:11,805 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 21:40:11,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:40:11,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:11,832 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:40:11,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:12,566 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:40:12,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:40:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:12,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:13,895 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:40:13,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:40:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:14,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66505647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:14,772 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:14,772 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 46 [2022-03-15 21:40:14,772 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [738500247] [2022-03-15 21:40:14,772 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:14,773 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:14,779 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 61 transitions. [2022-03-15 21:40:14,779 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:15,469 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [102637#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 102638#(and (<= 0 s) (= q_back q_front) (<= s 0)), 102633#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 102635#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 102634#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 102632#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 102636#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:40:15,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:40:15,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:15,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:40:15,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2793, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:40:15,470 INFO L87 Difference]: Start difference. First operand 222 states and 482 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 21:40:16,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:16,683 INFO L93 Difference]: Finished difference Result 264 states and 553 transitions. [2022-03-15 21:40:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:40:16,683 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 25 [2022-03-15 21:40:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:16,684 INFO L225 Difference]: With dead ends: 264 [2022-03-15 21:40:16,684 INFO L226 Difference]: Without dead ends: 253 [2022-03-15 21:40:16,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=339, Invalid=5361, Unknown=0, NotChecked=0, Total=5700 [2022-03-15 21:40:16,684 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:16,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:40:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-15 21:40:16,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 224. [2022-03-15 21:40:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.179372197309417) internal successors, (486), 223 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:16,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 486 transitions. [2022-03-15 21:40:16,687 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 486 transitions. Word has length 25 [2022-03-15 21:40:16,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:16,687 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 486 transitions. [2022-03-15 21:40:16,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 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 21:40:16,687 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 486 transitions. [2022-03-15 21:40:16,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:16,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:16,687 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:16,705 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 21:40:16,887 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 21:40:16,888 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:16,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:16,888 INFO L85 PathProgramCache]: Analyzing trace with hash -356344976, now seen corresponding path program 119 times [2022-03-15 21:40:16,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:16,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769072844] [2022-03-15 21:40:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:16,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:17,207 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:17,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769072844] [2022-03-15 21:40:17,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769072844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:17,207 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713759533] [2022-03-15 21:40:17,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:40:17,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:17,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:17,208 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 21:40:17,208 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 21:40:17,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:40:17,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:17,239 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:40:17,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:17,967 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-03-15 21:40:17,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 44 [2022-03-15 21:40:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:18,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:19,333 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:40:19,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 141 treesize of output 535 [2022-03-15 21:40:19,917 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:19,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713759533] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:19,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:19,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 46 [2022-03-15 21:40:19,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [190375612] [2022-03-15 21:40:19,918 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:19,919 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:19,935 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 59 transitions. [2022-03-15 21:40:19,935 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:20,609 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [103586#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 103589#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 103590#(and (<= 0 s) (= q_back q_front) (<= s 0)), 103585#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 103588#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 103587#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 103591#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:40:20,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:40:20,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:20,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:40:20,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2792, Unknown=0, NotChecked=0, Total=2970 [2022-03-15 21:40:20,610 INFO L87 Difference]: Start difference. First operand 224 states and 486 transitions. Second operand has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 21:40:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:21,834 INFO L93 Difference]: Finished difference Result 266 states and 558 transitions. [2022-03-15 21:40:21,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:40:21,834 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 25 [2022-03-15 21:40:21,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:21,835 INFO L225 Difference]: With dead ends: 266 [2022-03-15 21:40:21,835 INFO L226 Difference]: Without dead ends: 257 [2022-03-15 21:40:21,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1569 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=356, Invalid=5496, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:40:21,835 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:21,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 1166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:40:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-15 21:40:21,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 224. [2022-03-15 21:40:21,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.179372197309417) internal successors, (486), 223 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:21,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 486 transitions. [2022-03-15 21:40:21,838 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 486 transitions. Word has length 25 [2022-03-15 21:40:21,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:21,838 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 486 transitions. [2022-03-15 21:40:21,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 21:40:21,838 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 486 transitions. [2022-03-15 21:40:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:21,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:21,838 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:21,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-15 21:40:22,038 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 21:40:22,039 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:22,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:22,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1769332106, now seen corresponding path program 120 times [2022-03-15 21:40:22,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:22,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919157244] [2022-03-15 21:40:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:22,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:22,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:22,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919157244] [2022-03-15 21:40:22,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919157244] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:22,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592668607] [2022-03-15 21:40:22,382 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:40:22,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:22,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:22,383 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 21:40:22,383 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 21:40:22,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:40:22,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:22,413 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-15 21:40:22,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:23,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:23,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 32 [2022-03-15 21:40:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:23,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:24,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:24,288 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:40:24,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 130 treesize of output 362 [2022-03-15 21:40:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 1 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:25,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592668607] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:25,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:25,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 19] total 49 [2022-03-15 21:40:25,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [54290961] [2022-03-15 21:40:25,022 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:25,023 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:25,029 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 57 transitions. [2022-03-15 21:40:25,029 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:25,688 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [104547#(and (<= 0 s) (= q_back q_front) (<= s 0)), 104549#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 104545#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 104551#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 104550#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 104546#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 104548#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:40:25,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:40:25,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:25,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:40:25,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2883, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:40:25,689 INFO L87 Difference]: Start difference. First operand 224 states and 486 transitions. Second operand has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 21:40:26,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:26,888 INFO L93 Difference]: Finished difference Result 267 states and 556 transitions. [2022-03-15 21:40:26,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:40:26,888 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 25 [2022-03-15 21:40:26,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:26,889 INFO L225 Difference]: With dead ends: 267 [2022-03-15 21:40:26,889 INFO L226 Difference]: Without dead ends: 260 [2022-03-15 21:40:26,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1856 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=771, Invalid=5709, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:40:26,889 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 1231 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:26,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 7 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1231 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:40:26,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-03-15 21:40:26,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 201. [2022-03-15 21:40:26,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.15) internal successors, (430), 200 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:26,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 430 transitions. [2022-03-15 21:40:26,891 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 430 transitions. Word has length 25 [2022-03-15 21:40:26,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:26,892 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 430 transitions. [2022-03-15 21:40:26,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 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 21:40:26,892 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 430 transitions. [2022-03-15 21:40:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:26,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:26,892 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:26,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-15 21:40:27,092 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 21:40:27,093 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:27,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1107766632, now seen corresponding path program 121 times [2022-03-15 21:40:27,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:27,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782902458] [2022-03-15 21:40:27,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:27,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:27,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:27,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:27,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782902458] [2022-03-15 21:40:27,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782902458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:27,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497856976] [2022-03-15 21:40:27,449 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:40:27,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:27,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:27,450 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 21:40:27,451 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 21:40:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:27,479 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:40:27,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:28,221 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:40:28,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:40:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:28,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:29,561 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:40:29,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:40:30,606 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:30,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497856976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:30,606 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:30,606 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 47 [2022-03-15 21:40:30,606 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1340465175] [2022-03-15 21:40:30,606 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:30,608 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:30,613 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 65 transitions. [2022-03-15 21:40:30,613 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:31,372 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [105464#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 105460#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 105465#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 105461#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 105466#(and (<= 0 s) (= q_back q_front) (<= s 0)), 105462#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 105463#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:40:31,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:40:31,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:31,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:40:31,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2903, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:40:31,372 INFO L87 Difference]: Start difference. First operand 201 states and 430 transitions. Second operand has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 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 21:40:32,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:32,582 INFO L93 Difference]: Finished difference Result 244 states and 500 transitions. [2022-03-15 21:40:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:40:32,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 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 25 [2022-03-15 21:40:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:32,583 INFO L225 Difference]: With dead ends: 244 [2022-03-15 21:40:32,583 INFO L226 Difference]: Without dead ends: 229 [2022-03-15 21:40:32,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=325, Invalid=5527, Unknown=0, NotChecked=0, Total=5852 [2022-03-15 21:40:32,583 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 1248 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:32,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 14 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1248 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:40:32,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-15 21:40:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 202. [2022-03-15 21:40:32,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1492537313432836) internal successors, (432), 201 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:32,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 432 transitions. [2022-03-15 21:40:32,586 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 432 transitions. Word has length 25 [2022-03-15 21:40:32,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:32,586 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 432 transitions. [2022-03-15 21:40:32,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.125) internal successors, (51), 24 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 21:40:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 432 transitions. [2022-03-15 21:40:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:32,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:32,586 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:32,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-15 21:40:32,795 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 21:40:32,795 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:32,796 INFO L85 PathProgramCache]: Analyzing trace with hash -432888366, now seen corresponding path program 122 times [2022-03-15 21:40:32,796 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:32,796 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054541675] [2022-03-15 21:40:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:32,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:33,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:33,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054541675] [2022-03-15 21:40:33,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054541675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:33,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101380778] [2022-03-15 21:40:33,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:40:33,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:33,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:33,145 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 21:40:33,145 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 21:40:33,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:40:33,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:33,174 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:40:33,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:33,926 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:40:33,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:40:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:34,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:35,258 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:40:35,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:40:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:36,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101380778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:36,002 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:36,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 47 [2022-03-15 21:40:36,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2034111593] [2022-03-15 21:40:36,002 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:36,003 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:36,009 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 63 transitions. [2022-03-15 21:40:36,009 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:36,741 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [106350#(and (<= 0 s) (= q_back q_front) (<= s 0)), 106356#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 106354#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 106352#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 106353#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 106351#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 106355#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:40:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:40:36,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:36,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:40:36,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2903, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:40:36,741 INFO L87 Difference]: Start difference. First operand 202 states and 432 transitions. Second operand has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 21:40:38,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:38,042 INFO L93 Difference]: Finished difference Result 246 states and 505 transitions. [2022-03-15 21:40:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:40:38,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 25 [2022-03-15 21:40:38,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:38,043 INFO L225 Difference]: With dead ends: 246 [2022-03-15 21:40:38,043 INFO L226 Difference]: Without dead ends: 233 [2022-03-15 21:40:38,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=342, Invalid=5664, Unknown=0, NotChecked=0, Total=6006 [2022-03-15 21:40:38,043 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:38,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:40:38,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-03-15 21:40:38,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 203. [2022-03-15 21:40:38,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1485148514851486) internal successors, (434), 202 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 434 transitions. [2022-03-15 21:40:38,046 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 434 transitions. Word has length 25 [2022-03-15 21:40:38,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:38,046 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 434 transitions. [2022-03-15 21:40:38,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 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 21:40:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 434 transitions. [2022-03-15 21:40:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:38,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:38,046 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:38,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-15 21:40:38,246 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 21:40:38,248 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:38,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:38,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1103854760, now seen corresponding path program 123 times [2022-03-15 21:40:38,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:38,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110538379] [2022-03-15 21:40:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:38,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:38,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:38,631 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:38,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:38,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110538379] [2022-03-15 21:40:38,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110538379] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:38,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435414984] [2022-03-15 21:40:38,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:40:38,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:38,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:38,632 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 21:40:38,633 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 21:40:38,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:40:38,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:38,663 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-15 21:40:38,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:39,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:40:39,577 INFO L353 Elim1Store]: treesize reduction 59, result has 11.9 percent of original size [2022-03-15 21:40:39,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 83 treesize of output 43 [2022-03-15 21:40:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:39,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:41,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,242 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:41,465 INFO L353 Elim1Store]: treesize reduction 98, result has 73.0 percent of original size [2022-03-15 21:40:41,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 57 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 34 case distinctions, treesize of input 135 treesize of output 323 [2022-03-15 21:40:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:42,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435414984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:42,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:42,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 52 [2022-03-15 21:40:42,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1474115577] [2022-03-15 21:40:42,040 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:42,042 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:42,048 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 61 transitions. [2022-03-15 21:40:42,049 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:42,804 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [107253#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 107251#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 107254#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 107256#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 107252#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 107255#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 107257#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:40:42,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:40:42,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:42,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:40:42,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=3196, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:40:42,805 INFO L87 Difference]: Start difference. First operand 203 states and 434 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 21:40:44,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:44,242 INFO L93 Difference]: Finished difference Result 248 states and 510 transitions. [2022-03-15 21:40:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:40:44,243 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 25 [2022-03-15 21:40:44,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:44,243 INFO L225 Difference]: With dead ends: 248 [2022-03-15 21:40:44,243 INFO L226 Difference]: Without dead ends: 237 [2022-03-15 21:40:44,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=797, Invalid=6175, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 21:40:44,244 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:44,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 10 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:40:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-03-15 21:40:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 204. [2022-03-15 21:40:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.147783251231527) internal successors, (436), 203 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 436 transitions. [2022-03-15 21:40:44,247 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 436 transitions. Word has length 25 [2022-03-15 21:40:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:44,247 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 436 transitions. [2022-03-15 21:40:44,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 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 21:40:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 436 transitions. [2022-03-15 21:40:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:44,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:44,247 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:44,263 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 21:40:44,452 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 21:40:44,452 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1956782830, now seen corresponding path program 124 times [2022-03-15 21:40:44,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:44,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456096635] [2022-03-15 21:40:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:44,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:44,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:44,819 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:44,819 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:44,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456096635] [2022-03-15 21:40:44,819 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456096635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:44,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507394349] [2022-03-15 21:40:44,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:40:44,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:44,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:44,820 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 21:40:44,821 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 21:40:44,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:40:44,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:44,850 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:40:44,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:45,603 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:40:45,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:40:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:45,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:46,932 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:40:46,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:40:47,712 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:47,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507394349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:47,713 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:47,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 47 [2022-03-15 21:40:47,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1123888200] [2022-03-15 21:40:47,713 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:47,714 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:47,720 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 59 transitions. [2022-03-15 21:40:47,720 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:48,386 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [108157#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 108154#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 108156#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 108159#(and (<= 0 s) (= q_back q_front) (<= s 0)), 108153#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 108158#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 108155#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:40:48,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:40:48,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:48,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:40:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2903, Unknown=0, NotChecked=0, Total=3080 [2022-03-15 21:40:48,387 INFO L87 Difference]: Start difference. First operand 204 states and 436 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 24 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 21:40:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:49,757 INFO L93 Difference]: Finished difference Result 250 states and 515 transitions. [2022-03-15 21:40:49,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:40:49,757 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 24 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 25 [2022-03-15 21:40:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:49,758 INFO L225 Difference]: With dead ends: 250 [2022-03-15 21:40:49,758 INFO L226 Difference]: Without dead ends: 241 [2022-03-15 21:40:49,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1650 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=372, Invalid=5948, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:40:49,758 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:49,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 1332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:40:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-03-15 21:40:49,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 205. [2022-03-15 21:40:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1470588235294117) internal successors, (438), 204 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 438 transitions. [2022-03-15 21:40:49,761 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 438 transitions. Word has length 25 [2022-03-15 21:40:49,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:49,761 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 438 transitions. [2022-03-15 21:40:49,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 24 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 21:40:49,761 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 438 transitions. [2022-03-15 21:40:49,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:49,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:49,761 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:49,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-15 21:40:49,963 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 21:40:49,963 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:49,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:49,964 INFO L85 PathProgramCache]: Analyzing trace with hash 925197336, now seen corresponding path program 125 times [2022-03-15 21:40:49,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:49,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968915888] [2022-03-15 21:40:49,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:49,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:50,342 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:50,342 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:50,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968915888] [2022-03-15 21:40:50,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968915888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:50,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130074978] [2022-03-15 21:40:50,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:40:50,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:50,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:50,344 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 21:40:50,348 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 21:40:50,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:40:50,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:50,385 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-15 21:40:50,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:51,092 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:40:51,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 199 treesize of output 95 [2022-03-15 21:40:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:51,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:52,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:40:52,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:40:52,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 141 treesize of output 379 [2022-03-15 21:40:52,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:52,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130074978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:52,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:52,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20, 20] total 52 [2022-03-15 21:40:52,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [478749129] [2022-03-15 21:40:52,619 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:52,620 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:52,625 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 57 transitions. [2022-03-15 21:40:52,626 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:53,294 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [109069#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 109068#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 109067#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 109071#(and (<= 0 s) (= q_back q_front) (<= s 0)), 109066#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 109070#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 109072#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:40:53,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:40:53,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:53,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:40:53,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=3221, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:40:53,294 INFO L87 Difference]: Start difference. First operand 205 states and 438 transitions. Second operand has 25 states, 24 states have (on average 1.9583333333333333) 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 21:40:54,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:40:54,572 INFO L93 Difference]: Finished difference Result 252 states and 516 transitions. [2022-03-15 21:40:54,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:40:54,572 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9583333333333333) 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 25 [2022-03-15 21:40:54,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:40:54,572 INFO L225 Difference]: With dead ends: 252 [2022-03-15 21:40:54,572 INFO L226 Difference]: Without dead ends: 245 [2022-03-15 21:40:54,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=820, Invalid=6490, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 21:40:54,573 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:40:54,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 6 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:40:54,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-15 21:40:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 201. [2022-03-15 21:40:54,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.15) internal successors, (430), 200 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:40:54,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 430 transitions. [2022-03-15 21:40:54,575 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 430 transitions. Word has length 25 [2022-03-15 21:40:54,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:40:54,575 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 430 transitions. [2022-03-15 21:40:54,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9583333333333333) 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 21:40:54,576 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 430 transitions. [2022-03-15 21:40:54,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:40:54,576 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:40:54,576 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:40:54,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-03-15 21:40:54,783 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 21:40:54,783 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:40:54,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:40:54,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1371877680, now seen corresponding path program 126 times [2022-03-15 21:40:54,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:40:54,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746505345] [2022-03-15 21:40:54,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:40:54,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:40:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:40:55,162 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:40:55,162 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:40:55,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746505345] [2022-03-15 21:40:55,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746505345] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:40:55,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696042180] [2022-03-15 21:40:55,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:40:55,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:40:55,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:40:55,163 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 21:40:55,169 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 21:40:55,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:40:55,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:40:55,199 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-15 21:40:55,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:40:55,942 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-03-15 21:40:55,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 44 [2022-03-15 21:40:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:56,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:40:57,289 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:40:57,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:40:58,131 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:40:58,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696042180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:40:58,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:40:58,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 48 [2022-03-15 21:40:58,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [5359823] [2022-03-15 21:40:58,131 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:40:58,133 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:40:58,138 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 67 transitions. [2022-03-15 21:40:58,138 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:40:58,957 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [109971#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 109976#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 109974#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 109975#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 109973#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 109972#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 109977#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:40:58,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:40:58,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:40:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:40:58,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3015, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:40:58,958 INFO L87 Difference]: Start difference. First operand 201 states and 430 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 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 21:41:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:00,279 INFO L93 Difference]: Finished difference Result 245 states and 501 transitions. [2022-03-15 21:41:00,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:41:00,280 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 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 25 [2022-03-15 21:41:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:00,280 INFO L225 Difference]: With dead ends: 245 [2022-03-15 21:41:00,280 INFO L226 Difference]: Without dead ends: 228 [2022-03-15 21:41:00,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=328, Invalid=5834, Unknown=0, NotChecked=0, Total=6162 [2022-03-15 21:41:00,281 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 1409 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:00,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 1462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1409 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:41:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-15 21:41:00,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 202. [2022-03-15 21:41:00,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.1492537313432836) internal successors, (432), 201 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:00,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 432 transitions. [2022-03-15 21:41:00,283 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 432 transitions. Word has length 25 [2022-03-15 21:41:00,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:00,283 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 432 transitions. [2022-03-15 21:41:00,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 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 21:41:00,283 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 432 transitions. [2022-03-15 21:41:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:00,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:00,283 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:00,302 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 21:41:00,483 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 21:41:00,484 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:00,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:00,484 INFO L85 PathProgramCache]: Analyzing trace with hash 818267446, now seen corresponding path program 127 times [2022-03-15 21:41:00,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:00,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173368089] [2022-03-15 21:41:00,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:00,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:00,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:00,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173368089] [2022-03-15 21:41:00,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173368089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:00,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007393335] [2022-03-15 21:41:00,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:41:00,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:00,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:00,859 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 21:41:00,860 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 21:41:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:00,887 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:41:00,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:01,626 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:41:01,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:41:01,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:01,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:02,956 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:41:02,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:41:03,676 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:03,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007393335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:03,677 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:03,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 48 [2022-03-15 21:41:03,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [128541742] [2022-03-15 21:41:03,677 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:03,678 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:03,684 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 65 transitions. [2022-03-15 21:41:03,684 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:04,470 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [110865#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 110871#(and (<= 0 s) (= q_back q_front) (<= s 0)), 110868#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 110866#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 110869#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 110867#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 110870#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:41:04,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:41:04,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:04,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:41:04,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3015, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:41:04,471 INFO L87 Difference]: Start difference. First operand 202 states and 432 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 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 21:41:05,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:05,860 INFO L93 Difference]: Finished difference Result 247 states and 506 transitions. [2022-03-15 21:41:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:41:05,860 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 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 25 [2022-03-15 21:41:05,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:05,860 INFO L225 Difference]: With dead ends: 247 [2022-03-15 21:41:05,860 INFO L226 Difference]: Without dead ends: 232 [2022-03-15 21:41:05,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=345, Invalid=5975, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:41:05,861 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1446 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:05,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 15 Invalid, 1506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1446 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:41:05,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-03-15 21:41:05,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 203. [2022-03-15 21:41:05,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.1485148514851486) internal successors, (434), 202 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 434 transitions. [2022-03-15 21:41:05,863 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 434 transitions. Word has length 25 [2022-03-15 21:41:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:05,863 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 434 transitions. [2022-03-15 21:41:05,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 25 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 21:41:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 434 transitions. [2022-03-15 21:41:05,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:05,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:05,864 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:05,885 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 21:41:06,065 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 21:41:06,065 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:06,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:06,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1493145712, now seen corresponding path program 128 times [2022-03-15 21:41:06,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:06,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483125493] [2022-03-15 21:41:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:06,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:06,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:06,448 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:06,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:06,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483125493] [2022-03-15 21:41:06,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483125493] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:06,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905577809] [2022-03-15 21:41:06,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:41:06,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:06,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:06,449 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 21:41:06,450 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 21:41:06,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:41:06,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:06,482 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:41:06,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:07,235 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:41:07,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:41:07,329 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:07,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:08,582 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:41:08,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:41:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:09,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905577809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:09,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:09,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 48 [2022-03-15 21:41:09,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [579375030] [2022-03-15 21:41:09,569 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:09,570 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:09,575 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 63 transitions. [2022-03-15 21:41:09,576 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:10,336 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [111769#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 111770#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 111766#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 111771#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 111765#(and (<= 0 s) (= q_back q_front) (<= s 0)), 111767#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 111768#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:41:10,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:41:10,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:10,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:41:10,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3015, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:41:10,336 INFO L87 Difference]: Start difference. First operand 203 states and 434 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 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 21:41:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:11,847 INFO L93 Difference]: Finished difference Result 249 states and 511 transitions. [2022-03-15 21:41:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:41:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 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 25 [2022-03-15 21:41:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:11,847 INFO L225 Difference]: With dead ends: 249 [2022-03-15 21:41:11,847 INFO L226 Difference]: Without dead ends: 236 [2022-03-15 21:41:11,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=360, Invalid=6120, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:41:11,848 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1457 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:11,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 13 Invalid, 1524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1457 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:41:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-15 21:41:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 204. [2022-03-15 21:41:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.147783251231527) internal successors, (436), 203 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 436 transitions. [2022-03-15 21:41:11,850 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 436 transitions. Word has length 25 [2022-03-15 21:41:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:11,850 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 436 transitions. [2022-03-15 21:41:11,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 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 21:41:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 436 transitions. [2022-03-15 21:41:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:11,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:11,851 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:11,873 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 21:41:12,051 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 21:41:12,051 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:12,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:12,051 INFO L85 PathProgramCache]: Analyzing trace with hash 822179318, now seen corresponding path program 129 times [2022-03-15 21:41:12,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:12,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448165525] [2022-03-15 21:41:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:12,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:12,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:12,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:12,469 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:12,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448165525] [2022-03-15 21:41:12,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448165525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:12,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308954192] [2022-03-15 21:41:12,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:41:12,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:12,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:12,470 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 21:41:12,471 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 21:41:12,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:41:12,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:12,502 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-15 21:41:12,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:13,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:41:13,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 21 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 32 [2022-03-15 21:41:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:13,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:14,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:14,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:41:14,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 134 treesize of output 376 [2022-03-15 21:41:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:14,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308954192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:14,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:14,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 53 [2022-03-15 21:41:14,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1830241938] [2022-03-15 21:41:14,860 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:14,866 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:14,871 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 61 transitions. [2022-03-15 21:41:14,871 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:15,585 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [112678#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 112677#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 112680#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 112681#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 112682#(and (<= 0 s) (= q_back q_front) (<= s 0)), 112679#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 112676#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i))] [2022-03-15 21:41:15,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:41:15,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:15,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:41:15,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=3297, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:41:15,586 INFO L87 Difference]: Start difference. First operand 204 states and 436 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 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 21:41:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:16,975 INFO L93 Difference]: Finished difference Result 251 states and 516 transitions. [2022-03-15 21:41:16,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:41:16,975 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 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 25 [2022-03-15 21:41:16,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:16,976 INFO L225 Difference]: With dead ends: 251 [2022-03-15 21:41:16,976 INFO L226 Difference]: Without dead ends: 240 [2022-03-15 21:41:16,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2157 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=848, Invalid=6634, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:41:16,977 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:16,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 1436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:41:16,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-03-15 21:41:16,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 205. [2022-03-15 21:41:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.1470588235294117) internal successors, (438), 204 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 438 transitions. [2022-03-15 21:41:16,979 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 438 transitions. Word has length 25 [2022-03-15 21:41:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:16,979 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 438 transitions. [2022-03-15 21:41:16,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 25 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 21:41:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 438 transitions. [2022-03-15 21:41:16,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:16,979 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:16,979 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:16,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-15 21:41:17,180 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 21:41:17,180 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:17,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:17,180 INFO L85 PathProgramCache]: Analyzing trace with hash -30748752, now seen corresponding path program 130 times [2022-03-15 21:41:17,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:17,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547673283] [2022-03-15 21:41:17,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:17,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:17,560 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:17,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547673283] [2022-03-15 21:41:17,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547673283] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:17,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957916723] [2022-03-15 21:41:17,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:41:17,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:17,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:17,561 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 21:41:17,562 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 21:41:17,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:41:17,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:17,590 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:41:17,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:18,376 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:41:18,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:41:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:18,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:19,805 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:41:19,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:41:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:20,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957916723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:20,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:20,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 48 [2022-03-15 21:41:20,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1996786793] [2022-03-15 21:41:20,775 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:20,777 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:20,783 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 59 transitions. [2022-03-15 21:41:20,783 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:21,505 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [113591#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 113593#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 113589#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 113590#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 113594#(and (<= 0 s) (= q_back q_front) (<= s 0)), 113588#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 113592#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:41:21,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:41:21,505 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:21,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:41:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3015, Unknown=0, NotChecked=0, Total=3192 [2022-03-15 21:41:21,506 INFO L87 Difference]: Start difference. First operand 205 states and 438 transitions. Second operand has 26 states, 25 states have (on average 1.92) internal successors, (48), 25 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 21:41:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:23,078 INFO L93 Difference]: Finished difference Result 253 states and 521 transitions. [2022-03-15 21:41:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:41:23,079 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 25 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 25 [2022-03-15 21:41:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:23,079 INFO L225 Difference]: With dead ends: 253 [2022-03-15 21:41:23,079 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 21:41:23,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1737 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=390, Invalid=6416, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:41:23,080 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 1295 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:23,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 8 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1295 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:41:23,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 21:41:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 206. [2022-03-15 21:41:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.1463414634146343) internal successors, (440), 205 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 440 transitions. [2022-03-15 21:41:23,082 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 440 transitions. Word has length 25 [2022-03-15 21:41:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:23,082 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 440 transitions. [2022-03-15 21:41:23,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.92) internal successors, (48), 25 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 21:41:23,082 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 440 transitions. [2022-03-15 21:41:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:23,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:23,083 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:23,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-15 21:41:23,283 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 21:41:23,283 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:23,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:23,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1443735882, now seen corresponding path program 131 times [2022-03-15 21:41:23,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:23,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037366275] [2022-03-15 21:41:23,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:23,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:23,675 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:23,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:23,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037366275] [2022-03-15 21:41:23,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037366275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:23,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866132229] [2022-03-15 21:41:23,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:41:23,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:23,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:23,677 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 21:41:23,677 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 21:41:23,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:41:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:23,718 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-15 21:41:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:24,504 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:41:24,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:41:24,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:24,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:25,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:41:25,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:41:25,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 162 treesize of output 388 [2022-03-15 21:41:26,210 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:26,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866132229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:26,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:26,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 51 [2022-03-15 21:41:26,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [18707955] [2022-03-15 21:41:26,210 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:26,211 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:26,217 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 57 transitions. [2022-03-15 21:41:26,217 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:26,879 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [114509#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 114515#(and (<= 0 s) (= q_back q_front) (<= s 0)), 114513#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 114510#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 114512#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 114514#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 114511#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:41:26,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:41:26,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:41:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=3105, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:41:26,880 INFO L87 Difference]: Start difference. First operand 206 states and 440 transitions. Second operand has 26 states, 25 states have (on average 1.88) 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 21:41:28,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:28,288 INFO L93 Difference]: Finished difference Result 255 states and 522 transitions. [2022-03-15 21:41:28,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:41:28,289 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) 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 25 [2022-03-15 21:41:28,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:28,289 INFO L225 Difference]: With dead ends: 255 [2022-03-15 21:41:28,289 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 21:41:28,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 19 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2131 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=844, Invalid=6638, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:41:28,290 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:28,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 7 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1247 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:41:28,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 21:41:28,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 201. [2022-03-15 21:41:28,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.15) internal successors, (430), 200 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:28,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 430 transitions. [2022-03-15 21:41:28,292 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 430 transitions. Word has length 25 [2022-03-15 21:41:28,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:28,292 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 430 transitions. [2022-03-15 21:41:28,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) 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 21:41:28,292 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 430 transitions. [2022-03-15 21:41:28,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:28,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:28,292 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:28,308 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 21:41:28,493 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 21:41:28,493 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:28,493 INFO L85 PathProgramCache]: Analyzing trace with hash 931440024, now seen corresponding path program 132 times [2022-03-15 21:41:28,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:28,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372820446] [2022-03-15 21:41:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:28,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:28,930 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:28,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372820446] [2022-03-15 21:41:28,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372820446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:28,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132898818] [2022-03-15 21:41:28,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:41:28,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:28,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:28,932 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 21:41:28,932 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 21:41:28,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:41:28,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:28,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:41:28,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:29,758 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-03-15 21:41:29,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 44 [2022-03-15 21:41:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:29,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:31,224 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:41:31,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 141 treesize of output 535 [2022-03-15 21:41:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:32,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132898818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:32,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:32,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-03-15 21:41:32,161 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1572017853] [2022-03-15 21:41:32,161 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:32,162 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:32,168 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 69 transitions. [2022-03-15 21:41:32,168 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:33,081 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [115425#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 115426#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 115423#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 115428#(and (<= 0 s) (= q_back q_front) (<= s 0)), 115424#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 115422#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 115427#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:41:33,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:41:33,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:33,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:41:33,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3127, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:41:33,082 INFO L87 Difference]: Start difference. First operand 201 states and 430 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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 21:41:34,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:34,621 INFO L93 Difference]: Finished difference Result 244 states and 498 transitions. [2022-03-15 21:41:34,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:41:34,622 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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 25 [2022-03-15 21:41:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:34,624 INFO L225 Difference]: With dead ends: 244 [2022-03-15 21:41:34,624 INFO L226 Difference]: Without dead ends: 225 [2022-03-15 21:41:34,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=324, Invalid=5996, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:41:34,625 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 1636 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:34,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1636 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:41:34,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-15 21:41:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2022-03-15 21:41:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.145) internal successors, (429), 200 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 429 transitions. [2022-03-15 21:41:34,627 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 429 transitions. Word has length 25 [2022-03-15 21:41:34,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:34,628 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 429 transitions. [2022-03-15 21:41:34,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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 21:41:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 429 transitions. [2022-03-15 21:41:34,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:34,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:34,628 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:34,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-15 21:41:34,828 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 21:41:34,829 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:34,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:34,829 INFO L85 PathProgramCache]: Analyzing trace with hash 949391954, now seen corresponding path program 133 times [2022-03-15 21:41:34,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:34,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258258776] [2022-03-15 21:41:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:34,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:35,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:35,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258258776] [2022-03-15 21:41:35,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258258776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:35,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289405090] [2022-03-15 21:41:35,314 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:41:35,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:35,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:35,315 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 21:41:35,315 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 21:41:35,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:35,343 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:41:35,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:36,148 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:41:36,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:41:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:36,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:37,569 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:41:37,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:41:38,419 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:38,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289405090] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:38,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:38,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-03-15 21:41:38,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [876428576] [2022-03-15 21:41:38,419 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:38,421 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:38,426 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 67 transitions. [2022-03-15 21:41:38,426 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:39,304 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [116314#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 116319#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 116318#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 116317#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 116315#(and (<= 0 s) (= q_back q_front) (<= s 0)), 116316#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 116320#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i))] [2022-03-15 21:41:39,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:41:39,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:41:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3129, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:41:39,305 INFO L87 Difference]: Start difference. First operand 201 states and 429 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 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 21:41:40,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:40,855 INFO L93 Difference]: Finished difference Result 242 states and 495 transitions. [2022-03-15 21:41:40,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:41:40,856 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 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 25 [2022-03-15 21:41:40,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:40,856 INFO L225 Difference]: With dead ends: 242 [2022-03-15 21:41:40,856 INFO L226 Difference]: Without dead ends: 225 [2022-03-15 21:41:40,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=338, Invalid=6142, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:41:40,856 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 1529 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:40,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 17 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1529 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:41:40,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-03-15 21:41:40,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2022-03-15 21:41:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.14) internal successors, (428), 200 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 428 transitions. [2022-03-15 21:41:40,859 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 428 transitions. Word has length 25 [2022-03-15 21:41:40,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:40,859 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 428 transitions. [2022-03-15 21:41:40,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 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 21:41:40,859 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 428 transitions. [2022-03-15 21:41:40,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:40,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:40,859 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:40,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-15 21:41:41,059 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 21:41:41,060 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:41,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:41,060 INFO L85 PathProgramCache]: Analyzing trace with hash 395781720, now seen corresponding path program 134 times [2022-03-15 21:41:41,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:41,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301694144] [2022-03-15 21:41:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:41,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:41,480 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:41,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:41,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301694144] [2022-03-15 21:41:41,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301694144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:41,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014971383] [2022-03-15 21:41:41,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:41:41,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:41,481 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 21:41:41,482 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 21:41:41,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:41:41,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:41,511 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:41:41,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:42,311 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:41:42,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:41:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:42,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:43,749 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:41:43,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:41:44,582 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:44,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014971383] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:44,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:44,582 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-03-15 21:41:44,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1435758962] [2022-03-15 21:41:44,583 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:44,584 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:44,590 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 65 transitions. [2022-03-15 21:41:44,590 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:45,439 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [117212#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 117207#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 117209#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 117206#(and (<= 0 s) (= q_back q_front) (<= s 0)), 117211#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 117208#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 117210#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:41:45,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:41:45,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:45,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:41:45,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3129, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:41:45,440 INFO L87 Difference]: Start difference. First operand 201 states and 428 transitions. Second operand has 27 states, 26 states have (on average 1.9615384615384615) 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 21:41:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:47,048 INFO L93 Difference]: Finished difference Result 241 states and 494 transitions. [2022-03-15 21:41:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:41:47,048 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9615384615384615) 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 25 [2022-03-15 21:41:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:47,049 INFO L225 Difference]: With dead ends: 241 [2022-03-15 21:41:47,049 INFO L226 Difference]: Without dead ends: 226 [2022-03-15 21:41:47,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=353, Invalid=6289, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 21:41:47,050 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 1492 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 1559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:47,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 14 Invalid, 1559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1492 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:41:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-15 21:41:47,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 201. [2022-03-15 21:41:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.135) internal successors, (427), 200 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 427 transitions. [2022-03-15 21:41:47,052 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 427 transitions. Word has length 25 [2022-03-15 21:41:47,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:47,052 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 427 transitions. [2022-03-15 21:41:47,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9615384615384615) 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 21:41:47,052 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 427 transitions. [2022-03-15 21:41:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:47,052 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:47,052 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:47,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-15 21:41:47,253 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 21:41:47,253 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:47,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:47,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1070659986, now seen corresponding path program 135 times [2022-03-15 21:41:47,254 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:47,254 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249103838] [2022-03-15 21:41:47,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:47,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:47,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:47,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:47,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249103838] [2022-03-15 21:41:47,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249103838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:47,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186230968] [2022-03-15 21:41:47,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:41:47,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:47,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:47,694 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 21:41:47,694 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 21:41:47,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:41:47,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:47,725 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:41:47,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:48,550 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-03-15 21:41:48,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 44 [2022-03-15 21:41:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:48,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:50,041 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:41:50,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 141 treesize of output 535 [2022-03-15 21:41:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:50,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186230968] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:50,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:50,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-03-15 21:41:50,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [743540835] [2022-03-15 21:41:50,802 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:50,803 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:50,809 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 63 transitions. [2022-03-15 21:41:50,809 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:51,591 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [118099#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 118102#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 118104#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 118105#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 118100#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 118103#(and (<= 0 s) (= q_back q_front) (<= s 0)), 118101#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:41:51,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:41:51,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:51,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:41:51,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3126, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:41:51,592 INFO L87 Difference]: Start difference. First operand 201 states and 427 transitions. Second operand has 27 states, 26 states have (on average 1.9230769230769231) 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 21:41:53,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:53,159 INFO L93 Difference]: Finished difference Result 240 states and 493 transitions. [2022-03-15 21:41:53,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:41:53,159 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.9230769230769231) 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 25 [2022-03-15 21:41:53,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:53,160 INFO L225 Difference]: With dead ends: 240 [2022-03-15 21:41:53,160 INFO L226 Difference]: Without dead ends: 227 [2022-03-15 21:41:53,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=371, Invalid=6435, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:41:53,161 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 1445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:53,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 1445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:41:53,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-15 21:41:53,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 201. [2022-03-15 21:41:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.13) internal successors, (426), 200 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 426 transitions. [2022-03-15 21:41:53,163 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 426 transitions. Word has length 25 [2022-03-15 21:41:53,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:53,163 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 426 transitions. [2022-03-15 21:41:53,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.9230769230769231) 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 21:41:53,163 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 426 transitions. [2022-03-15 21:41:53,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:53,163 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:53,163 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:53,179 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 21:41:53,363 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 21:41:53,364 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash 399693592, now seen corresponding path program 136 times [2022-03-15 21:41:53,365 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:53,365 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571181200] [2022-03-15 21:41:53,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:53,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:41:53,817 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:41:53,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:41:53,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571181200] [2022-03-15 21:41:53,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571181200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:41:53,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348234770] [2022-03-15 21:41:53,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:41:53,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:41:53,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:41:53,818 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 21:41:53,819 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 21:41:53,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:41:53,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:41:53,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:41:53,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:41:54,662 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:41:54,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:41:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:54,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:41:56,137 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:41:56,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:41:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:41:57,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348234770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:41:57,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:41:57,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 49 [2022-03-15 21:41:57,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1363661607] [2022-03-15 21:41:57,131 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:41:57,132 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:41:57,138 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 61 transitions. [2022-03-15 21:41:57,138 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:41:57,919 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [118999#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 118998#(and (<= 0 s) (= q_back q_front) (<= s 0)), 118995#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 118994#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 118993#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 118996#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 118997#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:41:57,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:41:57,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:41:57,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:41:57,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3129, Unknown=0, NotChecked=0, Total=3306 [2022-03-15 21:41:57,920 INFO L87 Difference]: Start difference. First operand 201 states and 426 transitions. Second operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 21:41:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:41:59,530 INFO L93 Difference]: Finished difference Result 239 states and 492 transitions. [2022-03-15 21:41:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:41:59,530 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 25 [2022-03-15 21:41:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:41:59,531 INFO L225 Difference]: With dead ends: 239 [2022-03-15 21:41:59,531 INFO L226 Difference]: Without dead ends: 228 [2022-03-15 21:41:59,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=383, Invalid=6589, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 21:41:59,531 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:41:59,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 1361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1274 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:41:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-03-15 21:41:59,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 201. [2022-03-15 21:41:59,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.125) internal successors, (425), 200 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:41:59,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 425 transitions. [2022-03-15 21:41:59,533 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 425 transitions. Word has length 25 [2022-03-15 21:41:59,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:41:59,533 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 425 transitions. [2022-03-15 21:41:59,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 21:41:59,534 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 425 transitions. [2022-03-15 21:41:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:41:59,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:41:59,534 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:41:59,549 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 21:41:59,734 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 21:41:59,734 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:41:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:41:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -453234478, now seen corresponding path program 137 times [2022-03-15 21:41:59,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:41:59,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440405823] [2022-03-15 21:41:59,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:41:59,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:41:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:00,171 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:00,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:00,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440405823] [2022-03-15 21:42:00,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440405823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:00,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074668128] [2022-03-15 21:42:00,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:42:00,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:00,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:00,173 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 21:42:00,173 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 21:42:00,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:42:00,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:00,209 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 98 conjunts are in the unsatisfiable core [2022-03-15 21:42:00,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:01,032 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-03-15 21:42:01,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 195 treesize of output 95 [2022-03-15 21:42:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:01,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:02,655 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:42:02,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 155 treesize of output 541 [2022-03-15 21:42:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:03,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074668128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:03,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:03,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 51 [2022-03-15 21:42:03,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1366255163] [2022-03-15 21:42:03,599 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:03,600 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:03,605 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 59 transitions. [2022-03-15 21:42:03,605 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:04,325 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [119895#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 119893#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 119896#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 119892#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 119891#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 119890#(and (<= 0 s) (= q_back q_front) (<= s 0)), 119894#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:42:04,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:42:04,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:04,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:42:04,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3349, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:42:04,325 INFO L87 Difference]: Start difference. First operand 201 states and 425 transitions. Second operand has 27 states, 26 states have (on average 1.8461538461538463) 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 21:42:05,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:05,966 INFO L93 Difference]: Finished difference Result 238 states and 491 transitions. [2022-03-15 21:42:05,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:42:05,967 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8461538461538463) 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 25 [2022-03-15 21:42:05,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:05,967 INFO L225 Difference]: With dead ends: 238 [2022-03-15 21:42:05,967 INFO L226 Difference]: Without dead ends: 229 [2022-03-15 21:42:05,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=412, Invalid=7070, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:42:05,968 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1163 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:05,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 9 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1163 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:42:05,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-03-15 21:42:05,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 201. [2022-03-15 21:42:05,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.12) internal successors, (424), 200 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:42:05,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 424 transitions. [2022-03-15 21:42:05,971 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 424 transitions. Word has length 25 [2022-03-15 21:42:05,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:05,971 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 424 transitions. [2022-03-15 21:42:05,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8461538461538463) 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 21:42:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 424 transitions. [2022-03-15 21:42:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:42:05,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:05,971 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:05,993 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 21:42:06,172 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 21:42:06,172 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:06,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:06,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1866221608, now seen corresponding path program 138 times [2022-03-15 21:42:06,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:06,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102778642] [2022-03-15 21:42:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:06,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:06,575 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:42:06,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:06,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102778642] [2022-03-15 21:42:06,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102778642] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:06,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613636338] [2022-03-15 21:42:06,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:42:06,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:06,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:06,577 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 21:42:06,577 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 21:42:06,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:42:06,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:06,609 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:42:06,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:07,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:07,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:07,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:07,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:07,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:07,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 28 disjoint index pairs (out of 78 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 104 [2022-03-15 21:42:07,818 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:07,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:09,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,946 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,959 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:09,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:10,112 INFO L353 Elim1Store]: treesize reduction 287, result has 27.7 percent of original size [2022-03-15 21:42:10,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 70 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 35 case distinctions, treesize of input 167 treesize of output 180 [2022-03-15 21:42:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:10,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613636338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:10,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:10,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20, 20] total 54 [2022-03-15 21:42:10,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2084334487] [2022-03-15 21:42:10,481 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:10,483 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:10,488 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 57 transitions. [2022-03-15 21:42:10,488 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:11,243 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [120793#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 120797#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 120794#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 120796#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 120791#(and (<= 0 s) (= q_back q_front) (<= s 0)), 120795#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 120792#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i))] [2022-03-15 21:42:11,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:42:11,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:11,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:42:11,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3329, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:42:11,244 INFO L87 Difference]: Start difference. First operand 201 states and 424 transitions. Second operand has 27 states, 26 states have (on average 1.8076923076923077) 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 21:42:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:12,853 INFO L93 Difference]: Finished difference Result 237 states and 487 transitions. [2022-03-15 21:42:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:42:12,853 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8076923076923077) 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 25 [2022-03-15 21:42:12,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:12,853 INFO L225 Difference]: With dead ends: 237 [2022-03-15 21:42:12,853 INFO L226 Difference]: Without dead ends: 230 [2022-03-15 21:42:12,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1103, Invalid=7087, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 21:42:12,854 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 16 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:12,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 7 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:42:12,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-03-15 21:42:12,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 188. [2022-03-15 21:42:12,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.1336898395721926) internal successors, (399), 187 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:42:12,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 399 transitions. [2022-03-15 21:42:12,856 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 399 transitions. Word has length 25 [2022-03-15 21:42:12,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:12,856 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 399 transitions. [2022-03-15 21:42:12,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8076923076923077) 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 21:42:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 399 transitions. [2022-03-15 21:42:12,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:42:12,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:12,856 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:12,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-15 21:42:13,057 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 21:42:13,057 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash 162774576, now seen corresponding path program 139 times [2022-03-15 21:42:13,058 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:13,058 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266656315] [2022-03-15 21:42:13,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:13,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:13,531 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:13,531 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:13,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266656315] [2022-03-15 21:42:13,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266656315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:13,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572251632] [2022-03-15 21:42:13,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:42:13,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:13,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:13,533 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 21:42:13,533 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 21:42:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:13,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:42:13,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:14,388 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:42:14,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:42:14,506 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:14,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:15,874 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:42:15,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:42:16,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:16,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572251632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:16,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:16,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 21:42:16,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2117023973] [2022-03-15 21:42:16,777 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:16,779 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:16,792 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 81 transitions. [2022-03-15 21:42:16,792 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:18,070 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [121664#(and (<= 7 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= i 7)), 121666#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 121668#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 121669#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 121671#(and (<= 0 s) (= q_back q_front) (<= s 0)), 121667#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 121670#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 121663#(and (<= 7 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= N 7) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1)), 121665#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i))] [2022-03-15 21:42:18,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 21:42:18,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:18,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 21:42:18,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3477, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:42:18,071 INFO L87 Difference]: Start difference. First operand 188 states and 399 transitions. Second operand has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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 21:42:19,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:19,917 INFO L93 Difference]: Finished difference Result 249 states and 503 transitions. [2022-03-15 21:42:19,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:42:19,917 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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 25 [2022-03-15 21:42:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:19,918 INFO L225 Difference]: With dead ends: 249 [2022-03-15 21:42:19,918 INFO L226 Difference]: Without dead ends: 246 [2022-03-15 21:42:19,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1840 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=351, Invalid=7131, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:42:19,918 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1824 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:19,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1824 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:42:19,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-15 21:42:19,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 194. [2022-03-15 21:42:19,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.1191709844559585) internal successors, (409), 193 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:42:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 409 transitions. [2022-03-15 21:42:19,921 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 409 transitions. Word has length 25 [2022-03-15 21:42:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:19,921 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 409 transitions. [2022-03-15 21:42:19,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.103448275862069) internal successors, (61), 29 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 21:42:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 409 transitions. [2022-03-15 21:42:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:42:19,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:19,921 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:19,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-15 21:42:20,123 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 21:42:20,123 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:20,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:20,123 INFO L85 PathProgramCache]: Analyzing trace with hash 719284406, now seen corresponding path program 140 times [2022-03-15 21:42:20,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:20,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323461841] [2022-03-15 21:42:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:20,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:20,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:20,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:20,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323461841] [2022-03-15 21:42:20,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323461841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:20,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507923683] [2022-03-15 21:42:20,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:42:20,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:20,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:20,590 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 21:42:20,591 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 21:42:20,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:42:20,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:20,619 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:42:20,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:21,457 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:42:21,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:42:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:21,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:22,964 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:42:22,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:42:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:23,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507923683] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:23,828 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:23,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 21:42:23,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1169912532] [2022-03-15 21:42:23,828 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:23,830 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:23,836 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 73 transitions. [2022-03-15 21:42:23,836 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:24,915 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [122561#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 122563#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 122559#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 122560#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 122557#(and (<= 7 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= i 7)), 122564#(and (<= 0 s) (= q_back q_front) (<= s 0)), 122558#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 122562#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:42:24,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:42:24,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:42:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3360, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:42:24,916 INFO L87 Difference]: Start difference. First operand 194 states and 409 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 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 21:42:26,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:26,689 INFO L93 Difference]: Finished difference Result 259 states and 524 transitions. [2022-03-15 21:42:26,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:42:26,689 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 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 25 [2022-03-15 21:42:26,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:26,689 INFO L225 Difference]: With dead ends: 259 [2022-03-15 21:42:26,689 INFO L226 Difference]: Without dead ends: 226 [2022-03-15 21:42:26,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1754 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=342, Invalid=6798, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 21:42:26,690 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 643 mSDsCounter, 0 mSdLazyCounter, 1695 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 1759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:26,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 19 Invalid, 1759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1695 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:42:26,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-15 21:42:26,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 193. [2022-03-15 21:42:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.1197916666666665) internal successors, (407), 192 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:42:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 407 transitions. [2022-03-15 21:42:26,692 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 407 transitions. Word has length 25 [2022-03-15 21:42:26,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:26,692 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 407 transitions. [2022-03-15 21:42:26,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 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 21:42:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 407 transitions. [2022-03-15 21:42:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:42:26,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:26,693 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:26,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2022-03-15 21:42:26,893 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 21:42:26,893 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:26,893 INFO L85 PathProgramCache]: Analyzing trace with hash 737236336, now seen corresponding path program 141 times [2022-03-15 21:42:26,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:26,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573128566] [2022-03-15 21:42:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:26,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:27,359 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:27,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:27,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573128566] [2022-03-15 21:42:27,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573128566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:27,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236750096] [2022-03-15 21:42:27,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:42:27,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:27,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:27,361 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 21:42:27,361 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 21:42:27,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:42:27,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:27,392 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-15 21:42:27,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:28,240 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-03-15 21:42:28,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 96 treesize of output 44 [2022-03-15 21:42:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:28,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:29,712 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:42:29,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:42:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:30,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236750096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:30,343 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:30,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 21:42:30,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [319483271] [2022-03-15 21:42:30,343 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:30,344 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:30,351 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 71 transitions. [2022-03-15 21:42:30,351 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:31,360 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [123460#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 123461#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 123457#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 123456#(and (<= 7 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= i 7)), 123462#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 123458#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 123459#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 123463#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:42:31,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:42:31,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:31,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:42:31,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3360, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:42:31,360 INFO L87 Difference]: Start difference. First operand 193 states and 407 transitions. Second operand has 29 states, 28 states have (on average 1.9642857142857142) 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 21:42:33,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:33,275 INFO L93 Difference]: Finished difference Result 271 states and 550 transitions. [2022-03-15 21:42:33,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:42:33,275 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9642857142857142) 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 25 [2022-03-15 21:42:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:33,275 INFO L225 Difference]: With dead ends: 271 [2022-03-15 21:42:33,275 INFO L226 Difference]: Without dead ends: 242 [2022-03-15 21:42:33,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1838 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=364, Invalid=7118, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:42:33,276 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1737 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:33,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 17 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1737 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:42:33,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-03-15 21:42:33,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 192. [2022-03-15 21:42:33,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.1204188481675392) internal successors, (405), 191 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:42:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 405 transitions. [2022-03-15 21:42:33,278 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 405 transitions. Word has length 25 [2022-03-15 21:42:33,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:33,278 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 405 transitions. [2022-03-15 21:42:33,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9642857142857142) 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 21:42:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 405 transitions. [2022-03-15 21:42:33,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:42:33,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:33,279 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:33,298 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 21:42:33,479 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 21:42:33,479 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:33,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:33,479 INFO L85 PathProgramCache]: Analyzing trace with hash 183626102, now seen corresponding path program 142 times [2022-03-15 21:42:33,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:33,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24664079] [2022-03-15 21:42:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:33,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:33,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:33,938 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:33,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:33,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24664079] [2022-03-15 21:42:33,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24664079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:33,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454910833] [2022-03-15 21:42:33,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:42:33,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:33,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:33,940 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 21:42:33,940 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 21:42:33,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:42:33,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:33,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:42:33,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:34,802 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:42:34,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:42:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:34,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:36,307 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:42:36,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:42:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:37,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454910833] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:37,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:37,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 21:42:37,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [463722166] [2022-03-15 21:42:37,416 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:37,417 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:37,423 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 69 transitions. [2022-03-15 21:42:37,423 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:38,407 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [124376#(and (<= 0 s) (= q_back q_front) (<= s 0)), 124370#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 124371#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 124374#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 124369#(and (<= 7 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= i 7)), 124372#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 124375#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 124373#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:42:38,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:42:38,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:42:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3360, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:42:38,407 INFO L87 Difference]: Start difference. First operand 192 states and 405 transitions. Second operand has 29 states, 28 states have (on average 1.9285714285714286) 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 21:42:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:40,388 INFO L93 Difference]: Finished difference Result 286 states and 582 transitions. [2022-03-15 21:42:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:42:40,389 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9285714285714286) 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 25 [2022-03-15 21:42:40,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:40,389 INFO L225 Difference]: With dead ends: 286 [2022-03-15 21:42:40,389 INFO L226 Difference]: Without dead ends: 261 [2022-03-15 21:42:40,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1927 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=386, Invalid=7446, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 21:42:40,390 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 1633 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 1717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:40,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 14 Invalid, 1717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1633 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:42:40,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-15 21:42:40,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 191. [2022-03-15 21:42:40,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.1210526315789475) internal successors, (403), 190 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:42:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 403 transitions. [2022-03-15 21:42:40,392 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 403 transitions. Word has length 25 [2022-03-15 21:42:40,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:40,392 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 403 transitions. [2022-03-15 21:42:40,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9285714285714286) 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 21:42:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 403 transitions. [2022-03-15 21:42:40,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:42:40,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:40,393 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:40,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-03-15 21:42:40,609 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 21:42:40,609 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:40,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash 858504368, now seen corresponding path program 143 times [2022-03-15 21:42:40,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:40,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969269468] [2022-03-15 21:42:40,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:40,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:41,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:41,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969269468] [2022-03-15 21:42:41,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969269468] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:41,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076188692] [2022-03-15 21:42:41,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:42:41,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:41,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:41,075 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 21:42:41,075 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 21:42:41,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:42:41,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:41,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-15 21:42:41,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:41,987 INFO L353 Elim1Store]: treesize reduction 240, result has 0.4 percent of original size [2022-03-15 21:42:41,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 84 treesize of output 32 [2022-03-15 21:42:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:42,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:43,613 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:42:43,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 141 treesize of output 535 [2022-03-15 21:42:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:44,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076188692] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:44,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:44,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 52 [2022-03-15 21:42:44,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1574076615] [2022-03-15 21:42:44,617 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:44,618 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:44,624 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 67 transitions. [2022-03-15 21:42:44,624 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:45,564 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [125305#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 125303#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 125308#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 125301#(and (<= 7 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= i 7)), 125307#(and (<= 0 s) (= q_back q_front) (<= s 0)), 125302#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 125306#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 125304#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:42:45,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:42:45,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:45,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:42:45,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3592, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:42:45,565 INFO L87 Difference]: Start difference. First operand 191 states and 403 transitions. Second operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 21:42:47,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:47,689 INFO L93 Difference]: Finished difference Result 304 states and 620 transitions. [2022-03-15 21:42:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-15 21:42:47,689 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 25 [2022-03-15 21:42:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:47,690 INFO L225 Difference]: With dead ends: 304 [2022-03-15 21:42:47,690 INFO L226 Difference]: Without dead ends: 283 [2022-03-15 21:42:47,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=418, Invalid=8138, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 21:42:47,690 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:47,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 13 Invalid, 1731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:42:47,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-03-15 21:42:47,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 190. [2022-03-15 21:42:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.121693121693122) internal successors, (401), 189 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:42:47,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 401 transitions. [2022-03-15 21:42:47,693 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 401 transitions. Word has length 25 [2022-03-15 21:42:47,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:47,693 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 401 transitions. [2022-03-15 21:42:47,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 21:42:47,693 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 401 transitions. [2022-03-15 21:42:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:42:47,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:47,693 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:47,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Forceful destruction successful, exit code 0 [2022-03-15 21:42:47,893 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 21:42:47,894 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash 187537974, now seen corresponding path program 144 times [2022-03-15 21:42:47,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:47,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355272504] [2022-03-15 21:42:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:47,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:48,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:48,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355272504] [2022-03-15 21:42:48,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355272504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:48,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781347871] [2022-03-15 21:42:48,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:42:48,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:48,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:48,358 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 21:42:48,358 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 21:42:48,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:42:48,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:42:48,390 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 101 conjunts are in the unsatisfiable core [2022-03-15 21:42:48,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:49,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:42:49,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:42:49,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 39 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 110 [2022-03-15 21:42:49,665 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:49,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:42:53,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:42:53,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:42:53,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 63 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 28 case distinctions, treesize of input 142 treesize of output 372 [2022-03-15 21:42:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:54,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781347871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:42:54,024 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:42:54,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 55 [2022-03-15 21:42:54,024 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [616056776] [2022-03-15 21:42:54,024 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:42:54,025 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:42:54,031 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 65 transitions. [2022-03-15 21:42:54,031 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:42:55,008 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [126259#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 126260#(and (<= 0 s) (= q_back q_front) (<= s 0)), 126257#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 126263#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 126258#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 126256#(and (<= 7 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= i 7)), 126261#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 126262#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:42:55,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:42:55,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:42:55,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:42:55,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3672, Unknown=1, NotChecked=0, Total=4160 [2022-03-15 21:42:55,009 INFO L87 Difference]: Start difference. First operand 190 states and 401 transitions. Second operand has 29 states, 28 states have (on average 1.8571428571428572) 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 21:42:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:42:57,286 INFO L93 Difference]: Finished difference Result 325 states and 664 transitions. [2022-03-15 21:42:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-15 21:42:57,287 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8571428571428572) 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 25 [2022-03-15 21:42:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:42:57,287 INFO L225 Difference]: With dead ends: 325 [2022-03-15 21:42:57,287 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 21:42:57,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=912, Invalid=8593, Unknown=1, NotChecked=0, Total=9506 [2022-03-15 21:42:57,288 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 1674 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:42:57,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 11 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1674 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:42:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 21:42:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 189. [2022-03-15 21:42:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.122340425531915) internal successors, (399), 188 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:42:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 399 transitions. [2022-03-15 21:42:57,291 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 399 transitions. Word has length 25 [2022-03-15 21:42:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:42:57,291 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 399 transitions. [2022-03-15 21:42:57,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8571428571428572) 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 21:42:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 399 transitions. [2022-03-15 21:42:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:42:57,291 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:42:57,291 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:42:57,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-15 21:42:57,491 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 21:42:57,492 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:42:57,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:42:57,492 INFO L85 PathProgramCache]: Analyzing trace with hash -665390096, now seen corresponding path program 145 times [2022-03-15 21:42:57,493 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:42:57,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732033887] [2022-03-15 21:42:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:42:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:42:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:57,950 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:57,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:42:57,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732033887] [2022-03-15 21:42:57,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732033887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:42:57,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240698551] [2022-03-15 21:42:57,950 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:42:57,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:42:57,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:42:57,951 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 21:42:57,952 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 21:42:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:42:57,983 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:42:57,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:42:58,859 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:42:58,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:42:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:42:58,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:00,322 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:43:00,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:43:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:01,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240698551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:01,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:01,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 21:43:01,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [662856267] [2022-03-15 21:43:01,298 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:01,299 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:01,305 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 63 transitions. [2022-03-15 21:43:01,305 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:02,199 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [127236#(and (<= 0 s) (= q_back q_front) (<= s 0)), 127230#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 127234#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 127232#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 127233#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 127235#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 127231#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 127229#(and (<= 7 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= i 7))] [2022-03-15 21:43:02,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:43:02,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:02,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:43:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3360, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:43:02,199 INFO L87 Difference]: Start difference. First operand 189 states and 399 transitions. Second operand has 29 states, 28 states have (on average 1.8214285714285714) 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 21:43:04,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:04,558 INFO L93 Difference]: Finished difference Result 350 states and 740 transitions. [2022-03-15 21:43:04,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-15 21:43:04,558 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8214285714285714) 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 25 [2022-03-15 21:43:04,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:04,558 INFO L225 Difference]: With dead ends: 350 [2022-03-15 21:43:04,558 INFO L226 Difference]: Without dead ends: 336 [2022-03-15 21:43:04,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2218 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=452, Invalid=8478, Unknown=0, NotChecked=0, Total=8930 [2022-03-15 21:43:04,559 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1654 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:04,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 8 Invalid, 1770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1654 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:43:04,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-03-15 21:43:04,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 188. [2022-03-15 21:43:04,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.122994652406417) internal successors, (397), 187 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:04,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 397 transitions. [2022-03-15 21:43:04,562 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 397 transitions. Word has length 25 [2022-03-15 21:43:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:04,562 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 397 transitions. [2022-03-15 21:43:04,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8214285714285714) 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 21:43:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 397 transitions. [2022-03-15 21:43:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 21:43:04,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:04,562 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:04,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:04,762 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 21:43:04,763 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:04,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:04,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2078377226, now seen corresponding path program 146 times [2022-03-15 21:43:04,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:04,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153492089] [2022-03-15 21:43:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:04,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:05,260 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:05,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153492089] [2022-03-15 21:43:05,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153492089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:05,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110774568] [2022-03-15 21:43:05,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:43:05,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:05,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:05,262 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 21:43:05,262 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 21:43:05,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:43:05,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:05,291 WARN L261 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 94 conjunts are in the unsatisfiable core [2022-03-15 21:43:05,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:06,049 INFO L353 Elim1Store]: treesize reduction 252, result has 0.4 percent of original size [2022-03-15 21:43:06,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 100 treesize of output 44 [2022-03-15 21:43:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:06,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:07,634 INFO L353 Elim1Store]: treesize reduction 564, result has 45.8 percent of original size [2022-03-15 21:43:07,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 134 treesize of output 532 [2022-03-15 21:43:08,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:08,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110774568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:08,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:08,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 50 [2022-03-15 21:43:08,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1947646305] [2022-03-15 21:43:08,619 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:08,620 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:08,626 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 61 transitions. [2022-03-15 21:43:08,626 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:09,461 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [128230#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 128236#(and (<= 0 s) (= q_back q_front) (<= s 0)), 128229#(and (<= 7 N) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= i 7)), 128235#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 128234#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 128233#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 128231#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 128232#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:43:09,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:43:09,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:09,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:43:09,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3361, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:43:09,461 INFO L87 Difference]: Start difference. First operand 188 states and 397 transitions. Second operand has 29 states, 28 states have (on average 1.7857142857142858) 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 21:43:11,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:11,704 INFO L93 Difference]: Finished difference Result 320 states and 652 transitions. [2022-03-15 21:43:11,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-15 21:43:11,705 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.7857142857142858) 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 25 [2022-03-15 21:43:11,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:11,705 INFO L225 Difference]: With dead ends: 320 [2022-03-15 21:43:11,705 INFO L226 Difference]: Without dead ends: 313 [2022-03-15 21:43:11,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=464, Invalid=8848, Unknown=0, NotChecked=0, Total=9312 [2022-03-15 21:43:11,706 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1498 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:11,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 6 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1498 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:43:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-03-15 21:43:11,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 186. [2022-03-15 21:43:11,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.1243243243243244) internal successors, (393), 185 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:11,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 393 transitions. [2022-03-15 21:43:11,709 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 393 transitions. Word has length 25 [2022-03-15 21:43:11,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:11,709 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 393 transitions. [2022-03-15 21:43:11,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.7857142857142858) 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 21:43:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 393 transitions. [2022-03-15 21:43:11,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:43:11,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:11,709 INFO L514 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:11,724 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 21:43:11,919 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 21:43:11,919 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:11,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:11,919 INFO L85 PathProgramCache]: Analyzing trace with hash 751169484, now seen corresponding path program 147 times [2022-03-15 21:43:11,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:11,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291050628] [2022-03-15 21:43:11,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:11,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:11,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:11,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291050628] [2022-03-15 21:43:11,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291050628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:11,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829265630] [2022-03-15 21:43:11,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:43:11,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:11,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:11,982 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 21:43:11,983 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 21:43:12,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:43:12,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:12,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 21:43:12,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:12,061 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:12,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:43:12,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829265630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:12,107 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:12,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-03-15 21:43:12,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1038675935] [2022-03-15 21:43:12,107 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:12,109 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:12,117 INFO L252 McrAutomatonBuilder]: Finished intersection with 56 states and 84 transitions. [2022-03-15 21:43:12,117 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:12,263 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:43:12,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:43:12,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:12,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:43:12,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:43:12,263 INFO L87 Difference]: Start difference. First operand 186 states and 393 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 21:43:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:12,347 INFO L93 Difference]: Finished difference Result 368 states and 736 transitions. [2022-03-15 21:43:12,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:43:12,347 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 21:43:12,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:12,348 INFO L225 Difference]: With dead ends: 368 [2022-03-15 21:43:12,348 INFO L226 Difference]: Without dead ends: 347 [2022-03-15 21:43:12,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-03-15 21:43:12,348 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 47 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:12,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 2 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:43:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-15 21:43:12,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 208. [2022-03-15 21:43:12,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.135265700483092) internal successors, (442), 207 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:12,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 442 transitions. [2022-03-15 21:43:12,351 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 442 transitions. Word has length 26 [2022-03-15 21:43:12,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:12,352 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 442 transitions. [2022-03-15 21:43:12,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 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 21:43:12,352 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 442 transitions. [2022-03-15 21:43:12,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:43:12,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:12,352 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:12,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:12,553 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 21:43:12,553 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:12,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:12,553 INFO L85 PathProgramCache]: Analyzing trace with hash -530543091, now seen corresponding path program 148 times [2022-03-15 21:43:12,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:12,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247504597] [2022-03-15 21:43:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:12,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:12,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:12,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:12,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247504597] [2022-03-15 21:43:12,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247504597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:12,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431351204] [2022-03-15 21:43:12,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:43:12,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:12,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:12,655 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 21:43:12,655 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 21:43:12,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:43:12,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:12,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 21:43:12,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:12,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:12,771 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-15 21:43:12,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-03-15 21:43:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:12,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431351204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:12,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:12,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2022-03-15 21:43:12,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1100910579] [2022-03-15 21:43:12,826 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:12,827 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:12,833 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 62 transitions. [2022-03-15 21:43:12,833 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:12,942 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:43:12,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:43:12,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:12,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:43:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-03-15 21:43:12,943 INFO L87 Difference]: Start difference. First operand 208 states and 442 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 21:43:13,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:13,541 INFO L93 Difference]: Finished difference Result 527 states and 1065 transitions. [2022-03-15 21:43:13,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:43:13,541 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 21:43:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:13,542 INFO L225 Difference]: With dead ends: 527 [2022-03-15 21:43:13,542 INFO L226 Difference]: Without dead ends: 527 [2022-03-15 21:43:13,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 9 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 21:43:13,543 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 78 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:13,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 21 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1202 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 21:43:13,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-03-15 21:43:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 275. [2022-03-15 21:43:13,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.3503649635036497) internal successors, (644), 274 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:13,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 644 transitions. [2022-03-15 21:43:13,546 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 644 transitions. Word has length 26 [2022-03-15 21:43:13,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:13,546 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 644 transitions. [2022-03-15 21:43:13,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 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 21:43:13,546 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 644 transitions. [2022-03-15 21:43:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:43:13,546 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:13,546 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:13,563 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 21:43:13,747 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 21:43:13,747 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:13,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1737750693, now seen corresponding path program 149 times [2022-03-15 21:43:13,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:13,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555140263] [2022-03-15 21:43:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:13,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:13,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555140263] [2022-03-15 21:43:13,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555140263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:13,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752171114] [2022-03-15 21:43:13,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:43:13,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:13,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:13,856 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 21:43:13,857 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 21:43:13,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 21:43:13,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:13,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 21:43:13,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:13,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:14,024 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:43:14,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:43:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:14,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752171114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:14,082 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:14,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 15 [2022-03-15 21:43:14,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [534633294] [2022-03-15 21:43:14,082 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:14,084 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:14,091 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 64 transitions. [2022-03-15 21:43:14,091 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:14,222 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:43:14,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:43:14,223 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:14,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:43:14,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:43:14,223 INFO L87 Difference]: Start difference. First operand 275 states and 644 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21:43:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:15,156 INFO L93 Difference]: Finished difference Result 981 states and 2007 transitions. [2022-03-15 21:43:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-15 21:43:15,156 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21:43:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:15,158 INFO L225 Difference]: With dead ends: 981 [2022-03-15 21:43:15,158 INFO L226 Difference]: Without dead ends: 981 [2022-03-15 21:43:15,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=3723, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:43:15,158 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 206 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 1218 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:15,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 23 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:43:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-03-15 21:43:15,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 345. [2022-03-15 21:43:15,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.421511627906977) internal successors, (833), 344 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:15,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 833 transitions. [2022-03-15 21:43:15,164 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 833 transitions. Word has length 26 [2022-03-15 21:43:15,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:15,164 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 833 transitions. [2022-03-15 21:43:15,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 21:43:15,164 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 833 transitions. [2022-03-15 21:43:15,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:43:15,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:15,165 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:15,180 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 21:43:15,365 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 21:43:15,365 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:15,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:15,365 INFO L85 PathProgramCache]: Analyzing trace with hash -959586035, now seen corresponding path program 150 times [2022-03-15 21:43:15,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:15,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752401439] [2022-03-15 21:43:15,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:15,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:15,483 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:15,484 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:15,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752401439] [2022-03-15 21:43:15,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752401439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:15,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922088109] [2022-03-15 21:43:15,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:43:15,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:15,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:15,485 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 21:43:15,485 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 21:43:15,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:43:15,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:15,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 21:43:15,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:15,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:15,660 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:43:15,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:43:15,711 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:15,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922088109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:15,711 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:15,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 17 [2022-03-15 21:43:15,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2025222240] [2022-03-15 21:43:15,711 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:15,717 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:15,724 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 66 transitions. [2022-03-15 21:43:15,724 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:15,860 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:43:15,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:43:15,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:15,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:43:15,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:43:15,860 INFO L87 Difference]: Start difference. First operand 345 states and 833 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 21:43:17,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:17,508 INFO L93 Difference]: Finished difference Result 1958 states and 4089 transitions. [2022-03-15 21:43:17,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-15 21:43:17,509 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 21:43:17,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:17,511 INFO L225 Difference]: With dead ends: 1958 [2022-03-15 21:43:17,511 INFO L226 Difference]: Without dead ends: 1958 [2022-03-15 21:43:17,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4762 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1129, Invalid=11753, Unknown=0, NotChecked=0, Total=12882 [2022-03-15 21:43:17,512 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 388 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:17,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 25 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:43:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2022-03-15 21:43:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 485. [2022-03-15 21:43:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.4855371900826446) internal successors, (1203), 484 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1203 transitions. [2022-03-15 21:43:17,523 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1203 transitions. Word has length 26 [2022-03-15 21:43:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:17,523 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1203 transitions. [2022-03-15 21:43:17,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 21:43:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1203 transitions. [2022-03-15 21:43:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:43:17,524 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:17,524 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:17,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:17,735 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 21:43:17,735 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:17,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:17,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1322321317, now seen corresponding path program 151 times [2022-03-15 21:43:17,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:17,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620661290] [2022-03-15 21:43:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:17,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:17,922 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 21:43:17,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:17,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620661290] [2022-03-15 21:43:17,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620661290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:17,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968548013] [2022-03-15 21:43:17,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:43:17,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:17,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:17,923 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 21:43:17,924 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 21:43:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:17,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 21:43:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:18,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:43:18,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 21:43:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:18,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:18,215 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:43:18,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:43:18,269 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:18,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968548013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:18,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:18,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 27 [2022-03-15 21:43:18,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2042122652] [2022-03-15 21:43:18,269 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:18,270 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:18,277 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 68 transitions. [2022-03-15 21:43:18,277 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:18,443 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:43:18,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:43:18,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:18,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:43:18,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:43:18,444 INFO L87 Difference]: Start difference. First operand 485 states and 1203 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 21:43:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:24,905 INFO L93 Difference]: Finished difference Result 3212 states and 7079 transitions. [2022-03-15 21:43:24,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 262 states. [2022-03-15 21:43:24,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 21:43:24,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:24,909 INFO L225 Difference]: With dead ends: 3212 [2022-03-15 21:43:24,909 INFO L226 Difference]: Without dead ends: 3212 [2022-03-15 21:43:24,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30556 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4177, Invalid=68993, Unknown=0, NotChecked=0, Total=73170 [2022-03-15 21:43:24,913 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 179 mSDsluCounter, 1585 mSDsCounter, 0 mSdLazyCounter, 4036 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 4238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 4036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:24,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 31 Invalid, 4238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 4036 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-15 21:43:24,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3212 states. [2022-03-15 21:43:24,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3212 to 747. [2022-03-15 21:43:24,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 2.546916890080429) internal successors, (1900), 746 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:24,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1900 transitions. [2022-03-15 21:43:24,943 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1900 transitions. Word has length 26 [2022-03-15 21:43:24,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:24,943 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1900 transitions. [2022-03-15 21:43:24,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 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 21:43:24,943 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1900 transitions. [2022-03-15 21:43:24,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:43:24,944 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:24,944 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:24,960 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 21:43:25,144 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 21:43:25,144 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:25,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash -952994803, now seen corresponding path program 152 times [2022-03-15 21:43:25,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:25,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627464836] [2022-03-15 21:43:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:25,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:25,382 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 21:43:25,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:25,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627464836] [2022-03-15 21:43:25,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627464836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:25,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257787148] [2022-03-15 21:43:25,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:43:25,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:25,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:25,384 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 21:43:25,385 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 21:43:25,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:43:25,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:25,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 21:43:25,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:25,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:43:25,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 21:43:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:25,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:25,719 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:43:25,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:43:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:25,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257787148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:25,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:25,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 29 [2022-03-15 21:43:25,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1100618587] [2022-03-15 21:43:25,765 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:25,766 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:25,773 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 70 transitions. [2022-03-15 21:43:25,774 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:25,969 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:43:25,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:43:25,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:25,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:43:25,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:43:25,970 INFO L87 Difference]: Start difference. First operand 747 states and 1900 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 21:43:37,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:37,641 INFO L93 Difference]: Finished difference Result 7393 states and 16620 transitions. [2022-03-15 21:43:37,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 418 states. [2022-03-15 21:43:37,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 21:43:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:37,652 INFO L225 Difference]: With dead ends: 7393 [2022-03-15 21:43:37,652 INFO L226 Difference]: Without dead ends: 7393 [2022-03-15 21:43:37,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 427 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80572 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=9309, Invalid=174303, Unknown=0, NotChecked=0, Total=183612 [2022-03-15 21:43:37,659 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 157 mSDsluCounter, 2599 mSDsCounter, 0 mSdLazyCounter, 6544 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 6725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 6544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:37,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 35 Invalid, 6725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 6544 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-03-15 21:43:37,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7393 states. [2022-03-15 21:43:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7393 to 1203. [2022-03-15 21:43:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 2.6023294509151413) internal successors, (3128), 1202 states have internal predecessors, (3128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3128 transitions. [2022-03-15 21:43:37,706 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3128 transitions. Word has length 26 [2022-03-15 21:43:37,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:37,706 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 3128 transitions. [2022-03-15 21:43:37,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 21:43:37,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3128 transitions. [2022-03-15 21:43:37,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:43:37,707 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:37,707 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:37,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-15 21:43:37,929 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 21:43:37,929 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:37,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:37,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1526649509, now seen corresponding path program 153 times [2022-03-15 21:43:37,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:37,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683456623] [2022-03-15 21:43:37,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:37,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:38,147 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 21:43:38,147 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:38,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683456623] [2022-03-15 21:43:38,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683456623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:38,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708651486] [2022-03-15 21:43:38,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:43:38,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:38,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:38,148 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 21:43:38,149 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 21:43:38,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:43:38,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:38,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 21:43:38,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:38,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:43:38,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 21:43:38,422 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:38,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:38,555 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:43:38,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:43:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:38,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708651486] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:38,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:38,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 16] total 31 [2022-03-15 21:43:38,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1833802980] [2022-03-15 21:43:38,599 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:38,601 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:38,608 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 72 transitions. [2022-03-15 21:43:38,608 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:38,803 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:43:38,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:43:38,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:38,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:43:38,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=916, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:43:38,804 INFO L87 Difference]: Start difference. First operand 1203 states and 3128 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 21:43:58,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:43:58,492 INFO L93 Difference]: Finished difference Result 17812 states and 40241 transitions. [2022-03-15 21:43:58,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 596 states. [2022-03-15 21:43:58,492 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 21:43:58,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:43:58,530 INFO L225 Difference]: With dead ends: 17812 [2022-03-15 21:43:58,530 INFO L226 Difference]: Without dead ends: 17812 [2022-03-15 21:43:58,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 607 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165622 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=17335, Invalid=352937, Unknown=0, NotChecked=0, Total=370272 [2022-03-15 21:43:58,546 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 122 mSDsluCounter, 4482 mSDsCounter, 0 mSdLazyCounter, 10130 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 10277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 10130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:43:58,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 33 Invalid, 10277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 10130 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-15 21:43:58,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17812 states. [2022-03-15 21:43:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17812 to 1957. [2022-03-15 21:43:58,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1956 states have (on average 2.6600204498977504) internal successors, (5203), 1956 states have internal predecessors, (5203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:43:58,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 5203 transitions. [2022-03-15 21:43:58,746 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 5203 transitions. Word has length 26 [2022-03-15 21:43:58,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:43:58,746 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 5203 transitions. [2022-03-15 21:43:58,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 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 21:43:58,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 5203 transitions. [2022-03-15 21:43:58,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:43:58,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:43:58,747 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:43:58,763 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 21:43:58,947 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 21:43:58,948 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:43:58,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:43:58,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1086211853, now seen corresponding path program 154 times [2022-03-15 21:43:58,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:43:58,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48921731] [2022-03-15 21:43:58,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:43:58,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:43:58,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:43:59,133 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 21:43:59,133 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:43:59,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48921731] [2022-03-15 21:43:59,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48921731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:43:59,133 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546273211] [2022-03-15 21:43:59,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:43:59,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:43:59,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:43:59,134 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 21:43:59,134 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 21:43:59,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:43:59,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:43:59,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 21:43:59,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:43:59,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:43:59,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2022-03-15 21:43:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:59,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:43:59,599 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:43:59,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:43:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:43:59,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546273211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:43:59,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:43:59,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 33 [2022-03-15 21:43:59,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [292524419] [2022-03-15 21:43:59,642 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:43:59,643 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:43:59,650 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 74 transitions. [2022-03-15 21:43:59,650 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:43:59,898 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:43:59,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:43:59,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:43:59,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:43:59,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:43:59,899 INFO L87 Difference]: Start difference. First operand 1957 states and 5203 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 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 21:44:23,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:44:23,779 INFO L93 Difference]: Finished difference Result 6563 states and 13574 transitions. [2022-03-15 21:44:23,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 678 states. [2022-03-15 21:44:23,779 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 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 21:44:23,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:44:23,787 INFO L225 Difference]: With dead ends: 6563 [2022-03-15 21:44:23,788 INFO L226 Difference]: Without dead ends: 6563 [2022-03-15 21:44:23,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 692 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209371 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=22500, Invalid=458442, Unknown=0, NotChecked=0, Total=480942 [2022-03-15 21:44:23,810 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 9899 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 10019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 9899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-03-15 21:44:23,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 35 Invalid, 10019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 9899 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-03-15 21:44:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6563 states. [2022-03-15 21:44:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6563 to 218. [2022-03-15 21:44:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.129032258064516) internal successors, (462), 217 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 21:44:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 462 transitions. [2022-03-15 21:44:23,835 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 462 transitions. Word has length 26 [2022-03-15 21:44:23,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:44:23,835 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 462 transitions. [2022-03-15 21:44:23,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 18 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 21:44:23,835 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 462 transitions. [2022-03-15 21:44:23,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 21:44:23,836 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:44:23,836 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:44:23,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-15 21:44:24,036 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 21:44:24,037 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:44:24,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:44:24,037 INFO L85 PathProgramCache]: Analyzing trace with hash 317546405, now seen corresponding path program 155 times [2022-03-15 21:44:24,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:44:24,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59263560] [2022-03-15 21:44:24,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:44:24,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:44:24,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:24,216 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 21:44:24,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:44:24,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59263560] [2022-03-15 21:44:24,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59263560] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:44:24,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975756858] [2022-03-15 21:44:24,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:44:24,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:44:24,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:44:24,217 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 21:44:24,218 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 21:44:24,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:44:24,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:44:24,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 21:44:24,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:44:24,533 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 21:44:24,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:44:24,594 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-03-15 21:44:24,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 14 [2022-03-15 21:44:24,683 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 21:44:24,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975756858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:44:24,683 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:44:24,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 18] total 36 [2022-03-15 21:44:24,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [143370494] [2022-03-15 21:44:24,683 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:44:24,748 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:44:24,756 INFO L252 McrAutomatonBuilder]: Finished intersection with 57 states and 86 transitions. [2022-03-15 21:44:24,756 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:44:25,009 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:44:25,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 21:44:25,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:44:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 21:44:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:44:25,010 INFO L87 Difference]: Start difference. First operand 218 states and 462 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 21:44:25,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:44:25,935 INFO L93 Difference]: Finished difference Result 912 states and 1891 transitions. [2022-03-15 21:44:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:44:25,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 21:44:25,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:44:25,937 INFO L225 Difference]: With dead ends: 912 [2022-03-15 21:44:25,937 INFO L226 Difference]: Without dead ends: 912 [2022-03-15 21:44:25,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=533, Invalid=4023, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:44:25,937 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 140 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 21:44:25,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 33 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 21:44:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-03-15 21:44:25,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 238. [2022-03-15 21:44:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.147679324894515) internal successors, (509), 237 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:44:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 509 transitions. [2022-03-15 21:44:25,941 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 509 transitions. Word has length 26 [2022-03-15 21:44:25,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:44:25,941 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 509 transitions. [2022-03-15 21:44:25,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 21:44:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 509 transitions. [2022-03-15 21:44:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:44:25,942 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:44:25,942 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:44:25,958 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 21:44:26,142 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 21:44:26,142 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:44:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:44:26,143 INFO L85 PathProgramCache]: Analyzing trace with hash 733158287, now seen corresponding path program 156 times [2022-03-15 21:44:26,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:44:26,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225048700] [2022-03-15 21:44:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:44:26,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:44:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:44:26,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:44:26,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225048700] [2022-03-15 21:44:26,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225048700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:44:26,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109605278] [2022-03-15 21:44:26,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:44:26,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:44:26,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:44:26,517 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 21:44:26,517 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 21:44:26,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 21:44:26,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:44:26,552 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-15 21:44:26,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:44:27,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:27,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:27,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:27,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:27,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:27,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:27,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:44:27,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 36 disjoint index pairs (out of 120 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 252 treesize of output 120 [2022-03-15 21:44:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:27,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:44:30,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:44:30,646 INFO L353 Elim1Store]: treesize reduction 388, result has 23.2 percent of original size [2022-03-15 21:44:30,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 92 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 44 case distinctions, treesize of input 173 treesize of output 187 [2022-03-15 21:44:31,020 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:31,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109605278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:44:31,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:44:31,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 22] total 54 [2022-03-15 21:44:31,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1961197940] [2022-03-15 21:44:31,020 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:44:31,022 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:44:31,029 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 65 transitions. [2022-03-15 21:44:31,029 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:44:31,969 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [186023#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 186027#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 186021#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 186025#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 186024#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 186026#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 186022#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 186028#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:44:31,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:44:31,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:44:31,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:44:31,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=693, Invalid=3339, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:44:31,970 INFO L87 Difference]: Start difference. First operand 238 states and 509 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 21:44:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:44:33,349 INFO L93 Difference]: Finished difference Result 278 states and 575 transitions. [2022-03-15 21:44:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 21:44:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 27 [2022-03-15 21:44:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:44:33,349 INFO L225 Difference]: With dead ends: 278 [2022-03-15 21:44:33,349 INFO L226 Difference]: Without dead ends: 269 [2022-03-15 21:44:33,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1098, Invalid=5874, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 21:44:33,350 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:44:33,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 9 Invalid, 1373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:44:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-15 21:44:33,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 239. [2022-03-15 21:44:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.1470588235294117) internal successors, (511), 238 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:44:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 511 transitions. [2022-03-15 21:44:33,352 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 511 transitions. Word has length 27 [2022-03-15 21:44:33,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:44:33,352 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 511 transitions. [2022-03-15 21:44:33,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 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 21:44:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 511 transitions. [2022-03-15 21:44:33,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:44:33,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:44:33,353 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:44:33,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-15 21:44:33,553 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 21:44:33,553 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:44:33,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:44:33,553 INFO L85 PathProgramCache]: Analyzing trace with hash -679828843, now seen corresponding path program 157 times [2022-03-15 21:44:33,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:44:33,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437343645] [2022-03-15 21:44:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:44:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:44:33,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:44:33,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:44:33,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437343645] [2022-03-15 21:44:33,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437343645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:44:33,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678835842] [2022-03-15 21:44:33,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:44:33,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:44:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:44:33,905 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 21:44:33,908 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 21:44:33,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:33,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:44:33,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:44:34,741 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:44:34,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 36 [2022-03-15 21:44:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:34,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:44:36,696 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:44:36,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:44:38,203 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:38,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678835842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:44:38,204 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:44:38,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 21] total 49 [2022-03-15 21:44:38,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [16616792] [2022-03-15 21:44:38,204 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:44:38,205 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:44:38,212 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 63 transitions. [2022-03-15 21:44:38,212 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:44:39,017 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [187037#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 187038#(and (<= 0 s) (= q_back q_front) (<= s 0)), 187039#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 187036#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 187032#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 187033#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 187034#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 187035#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:44:39,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 21:44:39,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:44:39,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 21:44:39,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3225, Unknown=0, NotChecked=0, Total=3422 [2022-03-15 21:44:39,018 INFO L87 Difference]: Start difference. First operand 239 states and 511 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 21:44:40,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:44:40,320 INFO L93 Difference]: Finished difference Result 279 states and 575 transitions. [2022-03-15 21:44:40,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:44:40,320 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 27 [2022-03-15 21:44:40,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:44:40,320 INFO L225 Difference]: With dead ends: 279 [2022-03-15 21:44:40,321 INFO L226 Difference]: Without dead ends: 272 [2022-03-15 21:44:40,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=359, Invalid=5961, Unknown=0, NotChecked=0, Total=6320 [2022-03-15 21:44:40,321 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1282 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 21:44:40,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1282 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 21:44:40,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-15 21:44:40,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 238. [2022-03-15 21:44:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.147679324894515) internal successors, (509), 237 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:44:40,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 509 transitions. [2022-03-15 21:44:40,324 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 509 transitions. Word has length 27 [2022-03-15 21:44:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:44:40,324 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 509 transitions. [2022-03-15 21:44:40,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 21:44:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 509 transitions. [2022-03-15 21:44:40,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:44:40,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:44:40,324 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:44:40,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-15 21:44:40,524 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 21:44:40,525 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:44:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:44:40,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1964178441, now seen corresponding path program 158 times [2022-03-15 21:44:40,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:44:40,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232183830] [2022-03-15 21:44:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:44:40,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:44:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:44:40,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:44:40,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232183830] [2022-03-15 21:44:40,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232183830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:44:40,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813240617] [2022-03-15 21:44:40,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:44:40,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:44:40,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:44:40,937 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 21:44:40,937 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 21:44:40,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:44:40,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:44:40,969 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:44:40,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:44:41,938 INFO L353 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2022-03-15 21:44:41,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 114 treesize of output 50 [2022-03-15 21:44:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:42,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:44:43,769 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:44:43,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:44:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:45,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813240617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:44:45,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:44:45,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 21] total 50 [2022-03-15 21:44:45,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1238889551] [2022-03-15 21:44:45,025 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:44:45,026 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:44:45,033 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 67 transitions. [2022-03-15 21:44:45,033 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:44:45,971 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [188045#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 188046#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 188048#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 188051#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 188050#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 188052#(and (<= 0 s) (= q_back q_front) (<= s 0)), 188047#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 188049#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:44:45,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:44:45,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:44:45,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:44:45,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3342, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:44:45,972 INFO L87 Difference]: Start difference. First operand 238 states and 509 transitions. Second operand has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 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 21:44:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:44:47,370 INFO L93 Difference]: Finished difference Result 280 states and 578 transitions. [2022-03-15 21:44:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-15 21:44:47,370 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 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 27 [2022-03-15 21:44:47,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:44:47,371 INFO L225 Difference]: With dead ends: 280 [2022-03-15 21:44:47,371 INFO L226 Difference]: Without dead ends: 269 [2022-03-15 21:44:47,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1800 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=355, Invalid=6125, Unknown=0, NotChecked=0, Total=6480 [2022-03-15 21:44:47,372 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 1464 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:44:47,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1464 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:44:47,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-15 21:44:47,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 239. [2022-03-15 21:44:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.1470588235294117) internal successors, (511), 238 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:44:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 511 transitions. [2022-03-15 21:44:47,374 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 511 transitions. Word has length 27 [2022-03-15 21:44:47,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:44:47,374 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 511 transitions. [2022-03-15 21:44:47,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.25) internal successors, (54), 24 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 21:44:47,374 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 511 transitions. [2022-03-15 21:44:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:44:47,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:44:47,374 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:44:47,390 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-15 21:44:47,574 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 21:44:47,575 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:44:47,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:44:47,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1477860785, now seen corresponding path program 159 times [2022-03-15 21:44:47,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:44:47,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894910480] [2022-03-15 21:44:47,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:44:47,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:44:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:44:47,950 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:44:47,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894910480] [2022-03-15 21:44:47,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894910480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:44:47,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338333898] [2022-03-15 21:44:47,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:44:47,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:44:47,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:44:47,951 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 21:44:47,952 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 21:44:47,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 21:44:47,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:44:47,984 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:44:47,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:44:48,936 INFO L353 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2022-03-15 21:44:48,936 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 114 treesize of output 50 [2022-03-15 21:44:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:49,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:44:50,879 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:44:50,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:44:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:52,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338333898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:44:52,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:44:52,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 21] total 50 [2022-03-15 21:44:52,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1766578133] [2022-03-15 21:44:52,023 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:44:52,025 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:44:52,032 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 65 transitions. [2022-03-15 21:44:52,032 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:44:52,889 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [189067#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 189062#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 189063#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 189066#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 189068#(and (<= 0 s) (= q_back q_front) (<= s 0)), 189064#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 189061#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 189065#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:44:52,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 21:44:52,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:44:52,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 21:44:52,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3342, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 21:44:52,890 INFO L87 Difference]: Start difference. First operand 239 states and 511 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) 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 21:44:54,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:44:54,337 INFO L93 Difference]: Finished difference Result 282 states and 583 transitions. [2022-03-15 21:44:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:44:54,338 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) 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 27 [2022-03-15 21:44:54,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:44:54,338 INFO L225 Difference]: With dead ends: 282 [2022-03-15 21:44:54,338 INFO L226 Difference]: Without dead ends: 273 [2022-03-15 21:44:54,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=372, Invalid=6270, Unknown=0, NotChecked=0, Total=6642 [2022-03-15 21:44:54,339 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:44:54,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 9 Invalid, 1499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:44:54,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-15 21:44:54,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 240. [2022-03-15 21:44:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1464435146443517) internal successors, (513), 239 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:44:54,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 513 transitions. [2022-03-15 21:44:54,341 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 513 transitions. Word has length 27 [2022-03-15 21:44:54,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:44:54,341 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 513 transitions. [2022-03-15 21:44:54,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) 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 21:44:54,341 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 513 transitions. [2022-03-15 21:44:54,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:44:54,342 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:44:54,342 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:44:54,358 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 21:44:54,542 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 21:44:54,542 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:44:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:44:54,542 INFO L85 PathProgramCache]: Analyzing trace with hash 64873655, now seen corresponding path program 160 times [2022-03-15 21:44:54,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:44:54,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268642256] [2022-03-15 21:44:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:44:54,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:44:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:44:55,145 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:55,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:44:55,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268642256] [2022-03-15 21:44:55,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268642256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:44:55,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628109931] [2022-03-15 21:44:55,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:44:55,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:44:55,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:44:55,146 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 21:44:55,147 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 21:44:55,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:44:55,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:44:55,177 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:44:55,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:44:56,103 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:44:56,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 50 [2022-03-15 21:44:56,252 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:56,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:44:58,100 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:44:58,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:44:59,369 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:44:59,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628109931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:44:59,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:44:59,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 56 [2022-03-15 21:44:59,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1816547494] [2022-03-15 21:44:59,370 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:44:59,371 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:44:59,378 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 63 transitions. [2022-03-15 21:44:59,378 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:00,231 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [190090#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 190092#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 190089#(and (<= q_back (+ 7 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 190093#(and (<= 0 s) (= q_back q_front) (<= s 0)), 190091#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 190095#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 190096#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 190094#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:45:00,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-15 21:45:00,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:00,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-15 21:45:00,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=4067, Unknown=0, NotChecked=0, Total=4290 [2022-03-15 21:45:00,232 INFO L87 Difference]: Start difference. First operand 240 states and 513 transitions. Second operand has 31 states, 30 states have (on average 1.7333333333333334) 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 21:45:02,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:02,288 INFO L93 Difference]: Finished difference Result 312 states and 657 transitions. [2022-03-15 21:45:02,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 21:45:02,288 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.7333333333333334) 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 27 [2022-03-15 21:45:02,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:02,289 INFO L225 Difference]: With dead ends: 312 [2022-03-15 21:45:02,289 INFO L226 Difference]: Without dead ends: 305 [2022-03-15 21:45:02,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2590 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=476, Invalid=9030, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 21:45:02,290 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1639 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:02,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1639 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:45:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-15 21:45:02,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 259. [2022-03-15 21:45:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:02,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2022-03-15 21:45:02,292 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2022-03-15 21:45:02,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:02,292 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2022-03-15 21:45:02,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.7333333333333334) 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 21:45:02,292 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2022-03-15 21:45:02,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:45:02,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:02,293 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:02,310 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 21:45:02,493 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 21:45:02,493 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:02,493 INFO L85 PathProgramCache]: Analyzing trace with hash 317728911, now seen corresponding path program 161 times [2022-03-15 21:45:02,494 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:02,494 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809578892] [2022-03-15 21:45:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:02,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:02,918 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:02,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809578892] [2022-03-15 21:45:02,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809578892] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:02,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866495301] [2022-03-15 21:45:02,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:45:02,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:02,919 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 21:45:02,919 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 21:45:02,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:45:02,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:02,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:45:02,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:03,904 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:45:03,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 36 [2022-03-15 21:45:04,006 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:04,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:05,876 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:45:05,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 159 treesize of output 689 [2022-03-15 21:45:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:07,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866495301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:07,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:07,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 21] total 51 [2022-03-15 21:45:07,265 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [161123884] [2022-03-15 21:45:07,265 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:07,266 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:07,274 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 69 transitions. [2022-03-15 21:45:07,274 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:08,225 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [191200#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 191205#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 191204#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 191207#(and (<= 0 s) (= q_back q_front) (<= s 0)), 191206#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 191203#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 191202#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 191201#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i))] [2022-03-15 21:45:08,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:45:08,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:08,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:45:08,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3461, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:45:08,226 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 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 21:45:09,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:09,694 INFO L93 Difference]: Finished difference Result 304 states and 638 transitions. [2022-03-15 21:45:09,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 21:45:09,695 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 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 27 [2022-03-15 21:45:09,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:09,695 INFO L225 Difference]: With dead ends: 304 [2022-03-15 21:45:09,695 INFO L226 Difference]: Without dead ends: 291 [2022-03-15 21:45:09,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 21:45:09,696 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:09,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:45:09,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-15 21:45:09,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 261. [2022-03-15 21:45:09,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.1807692307692306) internal successors, (567), 260 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:09,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 567 transitions. [2022-03-15 21:45:09,698 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 567 transitions. Word has length 27 [2022-03-15 21:45:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:09,698 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 567 transitions. [2022-03-15 21:45:09,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 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 21:45:09,699 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 567 transitions. [2022-03-15 21:45:09,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:45:09,699 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:09,699 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:09,715 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 21:45:09,899 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 21:45:09,899 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:09,900 INFO L85 PathProgramCache]: Analyzing trace with hash -353237483, now seen corresponding path program 162 times [2022-03-15 21:45:09,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:09,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977786153] [2022-03-15 21:45:09,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:09,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:10,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:10,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977786153] [2022-03-15 21:45:10,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977786153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:10,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57971485] [2022-03-15 21:45:10,326 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:45:10,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:10,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:10,327 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 21:45:10,328 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 21:45:10,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:45:10,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:10,360 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-15 21:45:10,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:11,312 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:45:11,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 50 [2022-03-15 21:45:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:11,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:13,187 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:45:13,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:45:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:14,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57971485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:14,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:14,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 21] total 51 [2022-03-15 21:45:14,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [441570088] [2022-03-15 21:45:14,383 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:14,385 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:14,391 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 67 transitions. [2022-03-15 21:45:14,391 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:15,298 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [192289#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 192294#(and (<= 0 s) (= q_back q_front) (<= s 0)), 192293#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 192288#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 192287#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 192291#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 192292#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 192290#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:45:15,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:45:15,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:15,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:45:15,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3462, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:45:15,299 INFO L87 Difference]: Start difference. First operand 261 states and 567 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 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 21:45:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:16,842 INFO L93 Difference]: Finished difference Result 306 states and 643 transitions. [2022-03-15 21:45:16,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:45:16,842 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 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 27 [2022-03-15 21:45:16,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:16,843 INFO L225 Difference]: With dead ends: 306 [2022-03-15 21:45:16,843 INFO L226 Difference]: Without dead ends: 295 [2022-03-15 21:45:16,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1883 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=375, Invalid=6597, Unknown=0, NotChecked=0, Total=6972 [2022-03-15 21:45:16,844 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 1554 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:16,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 11 Invalid, 1611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1554 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:45:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-03-15 21:45:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 263. [2022-03-15 21:45:16,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.1793893129770994) internal successors, (571), 262 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:16,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 571 transitions. [2022-03-15 21:45:16,846 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 571 transitions. Word has length 27 [2022-03-15 21:45:16,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:16,846 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 571 transitions. [2022-03-15 21:45:16,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 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 21:45:16,846 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 571 transitions. [2022-03-15 21:45:16,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:45:16,847 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:16,847 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:16,863 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 21:45:17,047 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 21:45:17,047 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:17,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:17,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1206165553, now seen corresponding path program 163 times [2022-03-15 21:45:17,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:17,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072163728] [2022-03-15 21:45:17,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:17,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:17,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:17,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072163728] [2022-03-15 21:45:17,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072163728] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:17,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560976043] [2022-03-15 21:45:17,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:45:17,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:17,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:17,469 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 21:45:17,470 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 21:45:17,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:17,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:45:17,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:18,473 INFO L353 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2022-03-15 21:45:18,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 114 treesize of output 50 [2022-03-15 21:45:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:18,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:20,347 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:45:20,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:45:21,585 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:21,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560976043] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:21,586 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:21,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 21] total 51 [2022-03-15 21:45:21,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1426246042] [2022-03-15 21:45:21,586 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:21,587 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:21,594 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 65 transitions. [2022-03-15 21:45:21,594 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:22,486 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [193387#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 193386#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 193389#(and (<= 0 s) (= q_back q_front) (<= s 0)), 193383#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 193388#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 193382#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 193384#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 193385#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:45:22,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:45:22,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:22,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:45:22,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3462, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:45:22,487 INFO L87 Difference]: Start difference. First operand 263 states and 571 transitions. Second operand has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 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 21:45:24,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:24,045 INFO L93 Difference]: Finished difference Result 308 states and 648 transitions. [2022-03-15 21:45:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:45:24,045 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 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 27 [2022-03-15 21:45:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:24,046 INFO L225 Difference]: With dead ends: 308 [2022-03-15 21:45:24,046 INFO L226 Difference]: Without dead ends: 299 [2022-03-15 21:45:24,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1924 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=390, Invalid=6750, Unknown=0, NotChecked=0, Total=7140 [2022-03-15 21:45:24,046 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:24,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 8 Invalid, 1443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:45:24,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-15 21:45:24,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 263. [2022-03-15 21:45:24,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.1793893129770994) internal successors, (571), 262 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:24,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 571 transitions. [2022-03-15 21:45:24,049 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 571 transitions. Word has length 27 [2022-03-15 21:45:24,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:24,049 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 571 transitions. [2022-03-15 21:45:24,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.12) internal successors, (53), 25 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 21:45:24,049 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 571 transitions. [2022-03-15 21:45:24,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:45:24,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:24,050 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:24,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-15 21:45:24,250 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 21:45:24,250 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1675814613, now seen corresponding path program 164 times [2022-03-15 21:45:24,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:24,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602640291] [2022-03-15 21:45:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:24,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:24,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:24,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:24,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602640291] [2022-03-15 21:45:24,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602640291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:24,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281823066] [2022-03-15 21:45:24,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:45:24,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:24,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:24,703 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 21:45:24,703 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 21:45:24,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:45:24,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:24,734 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:45:24,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:25,605 INFO L353 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2022-03-15 21:45:25,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 114 treesize of output 50 [2022-03-15 21:45:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:25,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:27,524 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:45:27,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:45:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:28,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281823066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:28,696 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:28,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 21, 21] total 51 [2022-03-15 21:45:28,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [828720345] [2022-03-15 21:45:28,696 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:28,698 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:28,705 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 63 transitions. [2022-03-15 21:45:28,705 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:29,546 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [194486#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 194487#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 194488#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 194482#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 194481#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 194484#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 194485#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 194483#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:45:29,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-15 21:45:29,546 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-15 21:45:29,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3463, Unknown=0, NotChecked=0, Total=3660 [2022-03-15 21:45:29,547 INFO L87 Difference]: Start difference. First operand 263 states and 571 transitions. Second operand has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 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 21:45:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:31,111 INFO L93 Difference]: Finished difference Result 309 states and 646 transitions. [2022-03-15 21:45:31,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:45:31,112 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 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 27 [2022-03-15 21:45:31,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:31,112 INFO L225 Difference]: With dead ends: 309 [2022-03-15 21:45:31,112 INFO L226 Difference]: Without dead ends: 302 [2022-03-15 21:45:31,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1971 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=396, Invalid=6914, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 21:45:31,113 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:31,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:45:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-15 21:45:31,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 238. [2022-03-15 21:45:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.147679324894515) internal successors, (509), 237 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 509 transitions. [2022-03-15 21:45:31,115 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 509 transitions. Word has length 27 [2022-03-15 21:45:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:31,115 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 509 transitions. [2022-03-15 21:45:31,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.08) internal successors, (52), 25 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 21:45:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 509 transitions. [2022-03-15 21:45:31,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:45:31,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:31,116 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:31,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-15 21:45:31,316 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 21:45:31,316 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1957587209, now seen corresponding path program 165 times [2022-03-15 21:45:31,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:31,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361809390] [2022-03-15 21:45:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:31,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:31,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:31,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361809390] [2022-03-15 21:45:31,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361809390] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:31,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895480502] [2022-03-15 21:45:31,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:45:31,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:31,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:31,740 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 21:45:31,740 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 21:45:31,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:45:31,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:31,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-15 21:45:31,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:32,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:32,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:32,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 35 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 60 [2022-03-15 21:45:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:32,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:34,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:34,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:45:34,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 84 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 148 treesize of output 460 [2022-03-15 21:45:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:35,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895480502] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:35,129 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:35,129 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 57 [2022-03-15 21:45:35,129 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [18114582] [2022-03-15 21:45:35,129 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:35,131 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:35,138 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 71 transitions. [2022-03-15 21:45:35,138 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:36,125 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [195543#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 195546#(and (<= 0 s) (= q_back q_front) (<= s 0)), 195544#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 195541#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 195542#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 195539#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 195545#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 195540#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i))] [2022-03-15 21:45:36,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:45:36,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:36,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:45:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=571, Invalid=3851, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:45:36,126 INFO L87 Difference]: Start difference. First operand 238 states and 509 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 21:45:37,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:37,671 INFO L93 Difference]: Finished difference Result 284 states and 584 transitions. [2022-03-15 21:45:37,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-15 21:45:37,671 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 27 [2022-03-15 21:45:37,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:37,672 INFO L225 Difference]: With dead ends: 284 [2022-03-15 21:45:37,672 INFO L226 Difference]: Without dead ends: 269 [2022-03-15 21:45:37,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=895, Invalid=7115, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 21:45:37,673 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:37,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 14 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:45:37,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-15 21:45:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 239. [2022-03-15 21:45:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.1470588235294117) internal successors, (511), 238 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 511 transitions. [2022-03-15 21:45:37,675 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 511 transitions. Word has length 27 [2022-03-15 21:45:37,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:37,675 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 511 transitions. [2022-03-15 21:45:37,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 21:45:37,675 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 511 transitions. [2022-03-15 21:45:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:45:37,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:37,676 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:37,700 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 21:45:37,891 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 21:45:37,891 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:37,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:37,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1282708943, now seen corresponding path program 166 times [2022-03-15 21:45:37,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:37,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335605448] [2022-03-15 21:45:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:37,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:38,373 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:38,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:38,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335605448] [2022-03-15 21:45:38,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335605448] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:38,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834053378] [2022-03-15 21:45:38,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:45:38,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:38,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:38,374 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 21:45:38,375 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 21:45:38,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:45:38,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:38,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:45:38,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:39,371 INFO L353 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2022-03-15 21:45:39,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 114 treesize of output 50 [2022-03-15 21:45:39,476 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:39,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:41,305 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:45:41,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:45:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:42,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834053378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:42,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:42,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 52 [2022-03-15 21:45:42,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [68800917] [2022-03-15 21:45:42,568 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:42,569 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:42,576 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 69 transitions. [2022-03-15 21:45:42,576 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:43,540 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [196566#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 196570#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 196571#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 196565#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 196568#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 196572#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 196567#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 196569#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:45:43,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:45:43,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:43,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:45:43,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3584, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:45:43,541 INFO L87 Difference]: Start difference. First operand 239 states and 511 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 21:45:45,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:45,191 INFO L93 Difference]: Finished difference Result 286 states and 589 transitions. [2022-03-15 21:45:45,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:45:45,191 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 27 [2022-03-15 21:45:45,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:45,192 INFO L225 Difference]: With dead ends: 286 [2022-03-15 21:45:45,192 INFO L226 Difference]: Without dead ends: 273 [2022-03-15 21:45:45,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=378, Invalid=6932, Unknown=0, NotChecked=0, Total=7310 [2022-03-15 21:45:45,192 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1547 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 1607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:45,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 1607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1547 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:45:45,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-15 21:45:45,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 240. [2022-03-15 21:45:45,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1464435146443517) internal successors, (513), 239 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:45,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 513 transitions. [2022-03-15 21:45:45,195 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 513 transitions. Word has length 27 [2022-03-15 21:45:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:45,195 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 513 transitions. [2022-03-15 21:45:45,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 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 21:45:45,195 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 513 transitions. [2022-03-15 21:45:45,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:45:45,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:45,195 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:45,211 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 21:45:45,396 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 21:45:45,396 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:45,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:45,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1953675337, now seen corresponding path program 167 times [2022-03-15 21:45:45,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:45,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489166996] [2022-03-15 21:45:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:45,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:45,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:45,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489166996] [2022-03-15 21:45:45,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489166996] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:45,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324987985] [2022-03-15 21:45:45,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:45:45,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:45,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:45,815 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 21:45:45,815 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 21:45:45,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:45:45,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:45,847 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-15 21:45:45,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:46,845 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:45:46,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 36 [2022-03-15 21:45:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:46,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:48,856 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:45:48,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 164 treesize of output 692 [2022-03-15 21:45:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:50,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324987985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:50,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:50,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 52 [2022-03-15 21:45:50,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1788565321] [2022-03-15 21:45:50,277 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:50,278 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:50,285 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 67 transitions. [2022-03-15 21:45:50,286 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:51,214 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [197600#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 197603#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 197602#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 197597#(and (<= 0 s) (= q_back q_front) (<= s 0)), 197604#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 197601#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 197599#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 197598#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7))] [2022-03-15 21:45:51,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:45:51,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:51,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:45:51,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=3582, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:45:51,215 INFO L87 Difference]: Start difference. First operand 240 states and 513 transitions. Second operand has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 21:45:52,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:45:52,838 INFO L93 Difference]: Finished difference Result 288 states and 594 transitions. [2022-03-15 21:45:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:45:52,838 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 27 [2022-03-15 21:45:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:45:52,839 INFO L225 Difference]: With dead ends: 288 [2022-03-15 21:45:52,839 INFO L226 Difference]: Without dead ends: 277 [2022-03-15 21:45:52,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=397, Invalid=7085, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:45:52,840 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:45:52,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:45:52,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-15 21:45:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 241. [2022-03-15 21:45:52,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1458333333333335) internal successors, (515), 240 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:45:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 515 transitions. [2022-03-15 21:45:52,857 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 515 transitions. Word has length 27 [2022-03-15 21:45:52,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:45:52,858 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 515 transitions. [2022-03-15 21:45:52,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 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 21:45:52,858 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 515 transitions. [2022-03-15 21:45:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:45:52,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:45:52,858 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:45:52,876 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 21:45:53,058 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 21:45:53,058 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:45:53,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:45:53,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1488363889, now seen corresponding path program 168 times [2022-03-15 21:45:53,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:45:53,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707862285] [2022-03-15 21:45:53,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:45:53,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:45:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:45:53,479 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:45:53,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:45:53,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707862285] [2022-03-15 21:45:53,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707862285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:45:53,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651704497] [2022-03-15 21:45:53,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:45:53,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:45:53,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:45:53,481 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 21:45:53,481 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 21:45:53,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:45:53,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:45:53,515 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:45:53,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:45:54,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:45:54,746 INFO L353 Elim1Store]: treesize reduction 69, result has 10.4 percent of original size [2022-03-15 21:45:54,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 28 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 106 treesize of output 58 [2022-03-15 21:45:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:54,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:45:56,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,778 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:56,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:45:57,125 INFO L353 Elim1Store]: treesize reduction 122, result has 73.8 percent of original size [2022-03-15 21:45:57,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 77 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 43 case distinctions, treesize of input 146 treesize of output 404 [2022-03-15 21:45:57,949 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:45:57,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651704497] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:45:57,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:45:57,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 57 [2022-03-15 21:45:57,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1043808991] [2022-03-15 21:45:57,950 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:45:57,951 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:45:57,971 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 65 transitions. [2022-03-15 21:45:57,971 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:45:58,922 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [198644#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 198646#(and (<= 0 s) (= q_back q_front) (<= s 0)), 198643#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 198647#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 198640#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 198645#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 198641#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 198642#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i))] [2022-03-15 21:45:58,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:45:58,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:45:58,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:45:58,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=3870, Unknown=0, NotChecked=0, Total=4422 [2022-03-15 21:45:58,923 INFO L87 Difference]: Start difference. First operand 241 states and 515 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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 21:46:00,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:46:00,766 INFO L93 Difference]: Finished difference Result 290 states and 599 transitions. [2022-03-15 21:46:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:46:00,766 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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 27 [2022-03-15 21:46:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:46:00,767 INFO L225 Difference]: With dead ends: 290 [2022-03-15 21:46:00,767 INFO L226 Difference]: Without dead ends: 281 [2022-03-15 21:46:00,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=979, Invalid=7577, Unknown=0, NotChecked=0, Total=8556 [2022-03-15 21:46:00,768 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1517 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:46:00,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 9 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:46:00,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-15 21:46:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 242. [2022-03-15 21:46:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.145228215767635) internal successors, (517), 241 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:46:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 517 transitions. [2022-03-15 21:46:00,770 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 517 transitions. Word has length 27 [2022-03-15 21:46:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:46:00,770 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 517 transitions. [2022-03-15 21:46:00,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 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 21:46:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 517 transitions. [2022-03-15 21:46:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:46:00,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:46:00,771 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:46:00,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-03-15 21:46:00,974 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 21:46:00,974 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:46:00,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:46:00,974 INFO L85 PathProgramCache]: Analyzing trace with hash 75376759, now seen corresponding path program 169 times [2022-03-15 21:46:00,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:46:00,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765993409] [2022-03-15 21:46:00,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:46:00,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:46:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:46:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:46:01,422 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:46:01,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765993409] [2022-03-15 21:46:01,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765993409] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:46:01,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659402744] [2022-03-15 21:46:01,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:46:01,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:46:01,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:46:01,424 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 21:46:01,424 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 21:46:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:46:01,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:46:01,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:46:02,377 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:46:02,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 50 [2022-03-15 21:46:02,519 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:02,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:46:04,323 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:46:04,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:46:05,497 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:05,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659402744] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:46:05,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:46:05,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 21] total 52 [2022-03-15 21:46:05,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [502145342] [2022-03-15 21:46:05,498 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:46:05,499 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:46:05,506 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 63 transitions. [2022-03-15 21:46:05,506 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:46:06,381 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [199687#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 199690#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 199688#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 199689#(and (<= 0 s) (= q_back q_front) (<= s 0)), 199684#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 199685#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 199691#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 199686#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i))] [2022-03-15 21:46:06,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 21:46:06,382 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:46:06,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 21:46:06,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3585, Unknown=0, NotChecked=0, Total=3782 [2022-03-15 21:46:06,382 INFO L87 Difference]: Start difference. First operand 242 states and 517 transitions. Second operand has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 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 21:46:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:46:08,096 INFO L93 Difference]: Finished difference Result 292 states and 600 transitions. [2022-03-15 21:46:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:46:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 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 27 [2022-03-15 21:46:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:46:08,097 INFO L225 Difference]: With dead ends: 292 [2022-03-15 21:46:08,097 INFO L226 Difference]: Without dead ends: 285 [2022-03-15 21:46:08,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 25 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=414, Invalid=7418, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 21:46:08,098 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 1444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:46:08,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 6 Invalid, 1444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:46:08,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-15 21:46:08,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 238. [2022-03-15 21:46:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.147679324894515) internal successors, (509), 237 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:46:08,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 509 transitions. [2022-03-15 21:46:08,101 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 509 transitions. Word has length 27 [2022-03-15 21:46:08,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:46:08,101 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 509 transitions. [2022-03-15 21:46:08,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0) internal successors, (52), 26 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 21:46:08,101 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 509 transitions. [2022-03-15 21:46:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:46:08,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:46:08,101 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:46:08,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Forceful destruction successful, exit code 0 [2022-03-15 21:46:08,301 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 21:46:08,302 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:46:08,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:46:08,302 INFO L85 PathProgramCache]: Analyzing trace with hash 522057103, now seen corresponding path program 170 times [2022-03-15 21:46:08,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:46:08,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337552939] [2022-03-15 21:46:08,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:46:08,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:46:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:46:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:46:08,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:46:08,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337552939] [2022-03-15 21:46:08,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337552939] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:46:08,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356950898] [2022-03-15 21:46:08,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:46:08,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:46:08,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:46:08,767 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 21:46:08,767 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 21:46:08,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:46:08,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:46:08,799 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:46:08,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:46:09,780 INFO L353 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2022-03-15 21:46:09,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 114 treesize of output 50 [2022-03-15 21:46:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:09,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:46:11,668 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:46:11,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:46:12,968 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:12,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356950898] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:46:12,968 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:46:12,968 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 53 [2022-03-15 21:46:12,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1686671364] [2022-03-15 21:46:12,969 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:46:12,970 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:46:12,978 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 73 transitions. [2022-03-15 21:46:12,978 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:46:14,023 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [200726#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 200727#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 200725#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 200730#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 200729#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 200731#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 200728#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 200732#(and (<= 0 s) (= q_back q_front) (<= s 0))] [2022-03-15 21:46:14,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:46:14,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:46:14,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:46:14,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3708, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:46:14,024 INFO L87 Difference]: Start difference. First operand 238 states and 509 transitions. Second operand has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 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 21:46:15,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:46:15,707 INFO L93 Difference]: Finished difference Result 286 states and 587 transitions. [2022-03-15 21:46:15,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 21:46:15,707 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 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 27 [2022-03-15 21:46:15,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:46:15,707 INFO L225 Difference]: With dead ends: 286 [2022-03-15 21:46:15,707 INFO L226 Difference]: Without dead ends: 269 [2022-03-15 21:46:15,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=364, Invalid=7118, Unknown=0, NotChecked=0, Total=7482 [2022-03-15 21:46:15,708 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1681 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 1737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:46:15,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 16 Invalid, 1737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1681 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:46:15,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-15 21:46:15,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 239. [2022-03-15 21:46:15,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.1470588235294117) internal successors, (511), 238 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:46:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 511 transitions. [2022-03-15 21:46:15,710 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 511 transitions. Word has length 27 [2022-03-15 21:46:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:46:15,710 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 511 transitions. [2022-03-15 21:46:15,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 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 21:46:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 511 transitions. [2022-03-15 21:46:15,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:46:15,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:46:15,711 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:46:15,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-15 21:46:15,927 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 21:46:15,927 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:46:15,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:46:15,927 INFO L85 PathProgramCache]: Analyzing trace with hash -31553131, now seen corresponding path program 171 times [2022-03-15 21:46:15,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:46:15,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885898668] [2022-03-15 21:46:15,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:46:15,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:46:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:46:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:46:16,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:46:16,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885898668] [2022-03-15 21:46:16,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885898668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:46:16,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109476866] [2022-03-15 21:46:16,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:46:16,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:46:16,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:46:16,374 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 21:46:16,374 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 21:46:16,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:46:16,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:46:16,407 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-15 21:46:16,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:46:17,401 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:46:17,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 36 [2022-03-15 21:46:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:17,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:46:19,494 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:46:19,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 166 treesize of output 692 [2022-03-15 21:46:21,538 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:21,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109476866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:46:21,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:46:21,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 55 [2022-03-15 21:46:21,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1070949910] [2022-03-15 21:46:21,538 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:46:21,540 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:46:21,561 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 71 transitions. [2022-03-15 21:46:21,561 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:46:22,558 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [201760#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 201758#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 201762#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 201765#(and (<= 0 s) (= q_back q_front) (<= s 0)), 201763#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 201764#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 201759#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 201761#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:46:22,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:46:22,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:46:22,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:46:22,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=3950, Unknown=0, NotChecked=0, Total=4160 [2022-03-15 21:46:22,559 INFO L87 Difference]: Start difference. First operand 239 states and 511 transitions. Second operand has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 21:46:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:46:24,364 INFO L93 Difference]: Finished difference Result 288 states and 592 transitions. [2022-03-15 21:46:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:46:24,365 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 27 [2022-03-15 21:46:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:46:24,365 INFO L225 Difference]: With dead ends: 288 [2022-03-15 21:46:24,365 INFO L226 Difference]: Without dead ends: 273 [2022-03-15 21:46:24,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=394, Invalid=7616, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 21:46:24,366 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:46:24,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 15 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:46:24,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-03-15 21:46:24,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 240. [2022-03-15 21:46:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1464435146443517) internal successors, (513), 239 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:46:24,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 513 transitions. [2022-03-15 21:46:24,369 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 513 transitions. Word has length 27 [2022-03-15 21:46:24,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:46:24,369 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 513 transitions. [2022-03-15 21:46:24,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 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 21:46:24,369 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 513 transitions. [2022-03-15 21:46:24,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:46:24,369 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:46:24,369 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:46:24,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-03-15 21:46:24,569 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 21:46:24,570 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:46:24,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:46:24,570 INFO L85 PathProgramCache]: Analyzing trace with hash 643325135, now seen corresponding path program 172 times [2022-03-15 21:46:24,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:46:24,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493296835] [2022-03-15 21:46:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:46:24,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:46:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:46:25,062 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:46:25,063 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:46:25,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493296835] [2022-03-15 21:46:25,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493296835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:46:25,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712482420] [2022-03-15 21:46:25,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:46:25,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:46:25,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:46:25,064 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 21:46:25,064 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 21:46:25,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:46:25,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:46:25,096 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:46:25,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:46:26,141 INFO L353 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2022-03-15 21:46:26,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 114 treesize of output 50 [2022-03-15 21:46:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:26,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:46:28,024 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:46:28,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:46:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:29,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712482420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:46:29,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:46:29,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 53 [2022-03-15 21:46:29,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1437097982] [2022-03-15 21:46:29,013 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:46:29,014 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:46:29,021 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 69 transitions. [2022-03-15 21:46:29,021 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:46:29,949 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [202795#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 202801#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 202796#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 202802#(and (<= 0 s) (= q_back q_front) (<= s 0)), 202798#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 202797#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 202799#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 202800#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:46:29,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:46:29,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:46:29,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:46:29,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3708, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:46:29,950 INFO L87 Difference]: Start difference. First operand 240 states and 513 transitions. Second operand has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 21:46:31,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:46:31,693 INFO L93 Difference]: Finished difference Result 290 states and 597 transitions. [2022-03-15 21:46:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:46:31,693 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 27 [2022-03-15 21:46:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:46:31,694 INFO L225 Difference]: With dead ends: 290 [2022-03-15 21:46:31,694 INFO L226 Difference]: Without dead ends: 277 [2022-03-15 21:46:31,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=396, Invalid=7436, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 21:46:31,695 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:46:31,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:46:31,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-15 21:46:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 241. [2022-03-15 21:46:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1458333333333335) internal successors, (515), 240 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:46:31,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 515 transitions. [2022-03-15 21:46:31,697 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 515 transitions. Word has length 27 [2022-03-15 21:46:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:46:31,697 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 515 transitions. [2022-03-15 21:46:31,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 21:46:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 515 transitions. [2022-03-15 21:46:31,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:46:31,698 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:46:31,698 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:46:31,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Forceful destruction successful, exit code 0 [2022-03-15 21:46:31,898 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 21:46:31,898 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:46:31,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:46:31,898 INFO L85 PathProgramCache]: Analyzing trace with hash -27641259, now seen corresponding path program 173 times [2022-03-15 21:46:31,899 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:46:31,899 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860822805] [2022-03-15 21:46:31,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:46:31,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:46:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:46:32,389 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:46:32,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:46:32,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860822805] [2022-03-15 21:46:32,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860822805] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:46:32,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874475339] [2022-03-15 21:46:32,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:46:32,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:46:32,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:46:32,391 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 21:46:32,395 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 21:46:32,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:46:32,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:46:32,427 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 110 conjunts are in the unsatisfiable core [2022-03-15 21:46:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:46:33,474 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:46:33,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 50 [2022-03-15 21:46:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:33,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:46:35,542 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:46:35,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 173 treesize of output 695 [2022-03-15 21:46:36,782 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:36,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874475339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:46:36,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:46:36,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 53 [2022-03-15 21:46:36,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [556515248] [2022-03-15 21:46:36,782 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:46:36,784 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:46:36,790 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 67 transitions. [2022-03-15 21:46:36,791 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:46:37,703 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [203844#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 203845#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 203842#(and (<= 0 s) (= q_back q_front) (<= s 0)), 203839#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 203838#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 203840#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 203841#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 203843#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3))] [2022-03-15 21:46:37,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:46:37,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:46:37,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:46:37,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3704, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:46:37,704 INFO L87 Difference]: Start difference. First operand 241 states and 515 transitions. Second operand has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 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 21:46:39,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:46:39,555 INFO L93 Difference]: Finished difference Result 292 states and 602 transitions. [2022-03-15 21:46:39,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:46:39,556 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 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 27 [2022-03-15 21:46:39,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:46:39,556 INFO L225 Difference]: With dead ends: 292 [2022-03-15 21:46:39,556 INFO L226 Difference]: Without dead ends: 281 [2022-03-15 21:46:39,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=417, Invalid=7593, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 21:46:39,557 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1686 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 1767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:46:39,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 11 Invalid, 1767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1686 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:46:39,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-15 21:46:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 242. [2022-03-15 21:46:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.145228215767635) internal successors, (517), 241 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:46:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 517 transitions. [2022-03-15 21:46:39,559 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 517 transitions. Word has length 27 [2022-03-15 21:46:39,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:46:39,559 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 517 transitions. [2022-03-15 21:46:39,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.0) internal successors, (54), 27 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 21:46:39,559 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 517 transitions. [2022-03-15 21:46:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:46:39,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:46:39,560 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:46:39,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-03-15 21:46:39,760 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 21:46:39,760 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:46:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:46:39,760 INFO L85 PathProgramCache]: Analyzing trace with hash -880569329, now seen corresponding path program 174 times [2022-03-15 21:46:39,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:46:39,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128883947] [2022-03-15 21:46:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:46:39,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:46:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:46:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:46:40,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:46:40,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128883947] [2022-03-15 21:46:40,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128883947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:46:40,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481380526] [2022-03-15 21:46:40,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:46:40,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:46:40,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:46:40,233 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 21:46:40,234 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 21:46:40,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:46:40,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:46:40,266 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 109 conjunts are in the unsatisfiable core [2022-03-15 21:46:40,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:46:41,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:46:41,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:46:41,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 35 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 60 [2022-03-15 21:46:41,447 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:41,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:46:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:42,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:46:43,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:46:43,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 84 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 36 case distinctions, treesize of input 148 treesize of output 460 [2022-03-15 21:46:43,758 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:43,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481380526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:46:43,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:46:43,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 58 [2022-03-15 21:46:43,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [787476976] [2022-03-15 21:46:43,758 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:46:43,760 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:46:43,767 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 65 transitions. [2022-03-15 21:46:43,767 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:46:44,676 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [204892#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 204899#(and (<= 0 s) (= q_back q_front) (<= s 0)), 204894#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 204898#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 204893#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 204896#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 204895#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 204897#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front)))] [2022-03-15 21:46:44,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:46:44,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:46:44,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:46:44,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=3993, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 21:46:44,677 INFO L87 Difference]: Start difference. First operand 242 states and 517 transitions. Second operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 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 21:46:46,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:46:46,473 INFO L93 Difference]: Finished difference Result 294 states and 607 transitions. [2022-03-15 21:46:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 21:46:46,474 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 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 27 [2022-03-15 21:46:46,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:46:46,474 INFO L225 Difference]: With dead ends: 294 [2022-03-15 21:46:46,474 INFO L226 Difference]: Without dead ends: 285 [2022-03-15 21:46:46,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2417 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1022, Invalid=8098, Unknown=0, NotChecked=0, Total=9120 [2022-03-15 21:46:46,475 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 1613 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:46:46,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 8 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1613 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:46:46,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-15 21:46:46,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 243. [2022-03-15 21:46:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.144628099173554) internal successors, (519), 242 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:46:46,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 519 transitions. [2022-03-15 21:46:46,477 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 519 transitions. Word has length 27 [2022-03-15 21:46:46,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:46:46,477 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 519 transitions. [2022-03-15 21:46:46,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 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 21:46:46,477 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 519 transitions. [2022-03-15 21:46:46,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:46:46,478 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:46:46,478 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:46:46,493 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 21:46:46,687 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 21:46:46,687 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:46:46,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:46:46,688 INFO L85 PathProgramCache]: Analyzing trace with hash 2001410837, now seen corresponding path program 175 times [2022-03-15 21:46:46,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:46:46,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894161899] [2022-03-15 21:46:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:46:46,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:46:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:46:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:46:47,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:46:47,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894161899] [2022-03-15 21:46:47,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894161899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:46:47,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804647954] [2022-03-15 21:46:47,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:46:47,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:46:47,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:46:47,125 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 21:46:47,126 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 21:46:47,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:46:47,156 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:46:47,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:46:48,044 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:46:48,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 50 [2022-03-15 21:46:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:48,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:46:50,039 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:46:50,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:46:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:51,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804647954] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:46:51,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:46:51,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 53 [2022-03-15 21:46:51,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [410935976] [2022-03-15 21:46:51,504 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:46:51,505 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:46:51,512 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 63 transitions. [2022-03-15 21:46:51,512 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:46:52,377 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [205952#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 205954#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 205948#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 205953#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 205949#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 205951#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 205947#(and (<= 0 s) (= q_back q_front) (<= s 0)), 205950#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i))] [2022-03-15 21:46:52,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-15 21:46:52,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:46:52,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-15 21:46:52,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3709, Unknown=0, NotChecked=0, Total=3906 [2022-03-15 21:46:52,378 INFO L87 Difference]: Start difference. First operand 243 states and 519 transitions. Second operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 21:46:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:46:54,217 INFO L93 Difference]: Finished difference Result 296 states and 608 transitions. [2022-03-15 21:46:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-15 21:46:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 27 [2022-03-15 21:46:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:46:54,217 INFO L225 Difference]: With dead ends: 296 [2022-03-15 21:46:54,217 INFO L226 Difference]: Without dead ends: 289 [2022-03-15 21:46:54,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2163 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=432, Invalid=7940, Unknown=0, NotChecked=0, Total=8372 [2022-03-15 21:46:54,218 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 1543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 21:46:54,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 7 Invalid, 1543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 21:46:54,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-03-15 21:46:54,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 238. [2022-03-15 21:46:54,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.147679324894515) internal successors, (509), 237 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:46:54,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 509 transitions. [2022-03-15 21:46:54,221 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 509 transitions. Word has length 27 [2022-03-15 21:46:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:46:54,221 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 509 transitions. [2022-03-15 21:46:54,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 21:46:54,221 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 509 transitions. [2022-03-15 21:46:54,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:46:54,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:46:54,221 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:46:54,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Forceful destruction successful, exit code 0 [2022-03-15 21:46:54,421 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 21:46:54,422 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:46:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:46:54,422 INFO L85 PathProgramCache]: Analyzing trace with hash 81619447, now seen corresponding path program 176 times [2022-03-15 21:46:54,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:46:54,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515153401] [2022-03-15 21:46:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:46:54,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:46:54,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:46:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:46:54,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:46:54,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515153401] [2022-03-15 21:46:54,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515153401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:46:54,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413518295] [2022-03-15 21:46:54,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:46:54,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:46:54,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:46:54,922 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 21:46:54,922 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 21:46:54,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:46:54,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:46:54,952 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:46:54,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:46:55,982 INFO L353 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2022-03-15 21:46:55,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 114 treesize of output 50 [2022-03-15 21:46:56,095 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:56,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:46:57,928 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:46:57,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:46:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:46:59,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413518295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:46:59,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:46:59,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 54 [2022-03-15 21:46:59,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2059133947] [2022-03-15 21:46:59,242 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:46:59,244 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:46:59,251 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 75 transitions. [2022-03-15 21:46:59,251 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:00,332 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [207001#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 206997#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 207002#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 206999#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 207004#(and (<= 0 s) (= q_back q_front) (<= s 0)), 206998#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 207003#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 207000#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back))] [2022-03-15 21:47:00,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:47:00,333 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:00,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:47:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3834, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:47:00,333 INFO L87 Difference]: Start difference. First operand 238 states and 509 transitions. Second operand has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 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 21:47:02,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:02,101 INFO L93 Difference]: Finished difference Result 287 states and 588 transitions. [2022-03-15 21:47:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-15 21:47:02,101 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 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 27 [2022-03-15 21:47:02,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:02,102 INFO L225 Difference]: With dead ends: 287 [2022-03-15 21:47:02,102 INFO L226 Difference]: Without dead ends: 268 [2022-03-15 21:47:02,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 29 SyntacticMatches, 7 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=367, Invalid=7465, Unknown=0, NotChecked=0, Total=7832 [2022-03-15 21:47:02,103 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1734 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:47:02,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 18 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1734 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:47:02,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-15 21:47:02,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 239. [2022-03-15 21:47:02,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.1470588235294117) internal successors, (511), 238 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:47:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 511 transitions. [2022-03-15 21:47:02,105 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 511 transitions. Word has length 27 [2022-03-15 21:47:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:02,105 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 511 transitions. [2022-03-15 21:47:02,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 28 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 21:47:02,105 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 511 transitions. [2022-03-15 21:47:02,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:47:02,105 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:02,105 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:02,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-15 21:47:02,306 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 21:47:02,306 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:47:02,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:02,306 INFO L85 PathProgramCache]: Analyzing trace with hash 99571377, now seen corresponding path program 177 times [2022-03-15 21:47:02,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:02,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613992616] [2022-03-15 21:47:02,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:02,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:02,843 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:47:02,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:02,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613992616] [2022-03-15 21:47:02,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613992616] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:47:02,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570639229] [2022-03-15 21:47:02,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:47:02,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:02,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:47:02,845 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 21:47:02,845 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 21:47:02,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:47:02,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:47:02,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-15 21:47:02,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:47:03,909 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:47:03,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 96 treesize of output 36 [2022-03-15 21:47:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:04,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:47:05,959 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:47:05,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 166 treesize of output 692 [2022-03-15 21:47:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:07,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570639229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:47:07,080 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:47:07,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 54 [2022-03-15 21:47:07,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1151052647] [2022-03-15 21:47:07,081 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:47:07,082 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:47:07,089 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 73 transitions. [2022-03-15 21:47:07,090 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:08,135 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [208037#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 208032#(and (<= 0 s) (= q_back q_front) (<= s 0)), 208038#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 208033#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7)), 208036#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 208035#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 208039#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 208034#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i))] [2022-03-15 21:47:08,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:47:08,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:08,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:47:08,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3830, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:47:08,136 INFO L87 Difference]: Start difference. First operand 239 states and 511 transitions. Second operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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 21:47:09,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:09,945 INFO L93 Difference]: Finished difference Result 289 states and 593 transitions. [2022-03-15 21:47:09,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 21:47:09,945 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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 27 [2022-03-15 21:47:09,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:09,946 INFO L225 Difference]: With dead ends: 289 [2022-03-15 21:47:09,946 INFO L226 Difference]: Without dead ends: 272 [2022-03-15 21:47:09,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2064 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=390, Invalid=7620, Unknown=0, NotChecked=0, Total=8010 [2022-03-15 21:47:09,946 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1713 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 1781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 21:47:09,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 17 Invalid, 1781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1713 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 21:47:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-15 21:47:09,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 240. [2022-03-15 21:47:09,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1464435146443517) internal successors, (513), 239 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:47:09,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 513 transitions. [2022-03-15 21:47:09,949 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 513 transitions. Word has length 27 [2022-03-15 21:47:09,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:09,949 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 513 transitions. [2022-03-15 21:47:09,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 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 21:47:09,949 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 513 transitions. [2022-03-15 21:47:09,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:47:09,949 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:09,949 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:09,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-03-15 21:47:10,149 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 21:47:10,150 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:47:10,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:10,150 INFO L85 PathProgramCache]: Analyzing trace with hash -454038857, now seen corresponding path program 178 times [2022-03-15 21:47:10,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:10,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169054775] [2022-03-15 21:47:10,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:10,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:10,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:47:10,646 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:10,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169054775] [2022-03-15 21:47:10,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169054775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:47:10,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238014916] [2022-03-15 21:47:10,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:47:10,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:10,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:47:10,647 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 21:47:10,647 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 21:47:10,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:47:10,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:47:10,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:47:10,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:47:11,677 INFO L353 Elim1Store]: treesize reduction 336, result has 0.3 percent of original size [2022-03-15 21:47:11,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 114 treesize of output 50 [2022-03-15 21:47:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:11,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:47:13,633 INFO L353 Elim1Store]: treesize reduction 756, result has 45.3 percent of original size [2022-03-15 21:47:13,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 152 treesize of output 686 [2022-03-15 21:47:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:14,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238014916] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:47:14,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:47:14,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 54 [2022-03-15 21:47:14,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [34318397] [2022-03-15 21:47:14,766 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:47:14,767 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:47:14,775 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 71 transitions. [2022-03-15 21:47:14,775 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:47:15,769 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [209074#(and (<= q_back (+ 6 q_front)) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= (+ 6 q_front) q_back) (<= i 6) (= (select q (+ 5 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 6 i)), 209080#(and (<= 0 s) (= q_back q_front) (<= s 0)), 209075#(and (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= i 5) (= (select q (+ 2 q_front)) 1) (<= q_back (+ 5 q_front)) (<= (+ 5 q_front) q_back) (<= 5 i)), 209077#(and (<= 3 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= q_back (+ 3 q_front)) (<= (+ 3 q_front) q_back) (= (select q (+ 2 q_front)) 1) (<= i 3)), 209078#(and (<= 2 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (<= (+ 2 q_front) q_back) (<= i 2) (<= q_back (+ 2 q_front))), 209076#(and (<= 4 i) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (<= q_back (+ q_front 4)) (<= i 4) (= (select q (+ 2 q_front)) 1) (<= (+ q_front 4) q_back)), 209079#(and (= (select q q_front) 1) (<= i 1) (<= (+ q_front 1) q_back) (<= q_back (+ q_front 1)) (<= 1 i)), 209073#(and (<= q_back (+ 7 q_front)) (<= (+ 7 q_front) q_back) (= (select q (+ q_front 4)) 1) (= (select q q_front) 1) (= (select q (+ q_front 1)) 1) (= (select q (+ 3 q_front)) 1) (= (select q (+ 5 q_front)) 1) (= (select q (+ 6 q_front)) 1) (= (select q (+ 2 q_front)) 1) (<= 7 i) (<= i 7))] [2022-03-15 21:47:15,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-15 21:47:15,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:47:15,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-15 21:47:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3834, Unknown=0, NotChecked=0, Total=4032 [2022-03-15 21:47:15,770 INFO L87 Difference]: Start difference. First operand 240 states and 513 transitions. Second operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 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 21:47:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:47:17,678 INFO L93 Difference]: Finished difference Result 291 states and 598 transitions. [2022-03-15 21:47:17,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-15 21:47:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 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 27 [2022-03-15 21:47:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:47:17,679 INFO L225 Difference]: With dead ends: 291 [2022-03-15 21:47:17,679 INFO L226 Difference]: Without dead ends: 276 [2022-03-15 21:47:17,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=399, Invalid=7791, Unknown=0, NotChecked=0, Total=8190 [2022-03-15 21:47:17,680 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 17 mSDsluCounter, 581 mSDsCounter, 0 mSdLazyCounter, 1854 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 21:47:17,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 15 Invalid, 1929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1854 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 21:47:17,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-03-15 21:47:17,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 241. [2022-03-15 21:47:17,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.1458333333333335) internal successors, (515), 240 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:47:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 515 transitions. [2022-03-15 21:47:17,682 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 515 transitions. Word has length 27 [2022-03-15 21:47:17,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:47:17,682 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 515 transitions. [2022-03-15 21:47:17,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 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 21:47:17,682 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 515 transitions. [2022-03-15 21:47:17,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 21:47:17,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:47:17,683 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:47:17,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-03-15 21:47:17,883 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 21:47:17,883 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:47:17,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:47:17,883 INFO L85 PathProgramCache]: Analyzing trace with hash 220839409, now seen corresponding path program 179 times [2022-03-15 21:47:17,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:47:17,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573362006] [2022-03-15 21:47:17,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:47:17,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:47:17,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:47:18,406 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:47:18,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:47:18,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573362006] [2022-03-15 21:47:18,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573362006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:47:18,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270256286] [2022-03-15 21:47:18,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:47:18,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:47:18,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:47:18,407 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 21:47:18,408 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 21:47:18,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:47:18,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:47:18,443 WARN L261 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 106 conjunts are in the unsatisfiable core [2022-03-15 21:47:18,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:47:19,471 INFO L353 Elim1Store]: treesize reduction 322, result has 0.3 percent of original size [2022-03-15 21:47:19,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 110 treesize of output 50 [2022-03-15 21:47:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:47:19,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-03-15 21:47:19,683 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 21:47:19,686 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 21:47:19,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-15 21:47:19,709 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 21:47:19,886 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 21:47:19,886 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 41 known predicates. [2022-03-15 21:47:19,888 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 21:47:19,888 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 21:47:19,889 INFO L732 BasicCegarLoop]: Path program histogram: [179, 3, 1] [2022-03-15 21:47:19,890 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 21:47:19,890 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 21:47:19,891 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 09:47:19 BasicIcfg [2022-03-15 21:47:19,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 21:47:19,891 INFO L158 Benchmark]: Toolchain (without parser) took 748910.95ms. Allocated memory was 173.0MB in the beginning and 886.0MB in the end (delta: 713.0MB). Free memory was 130.7MB in the beginning and 597.9MB in the end (delta: -467.1MB). Peak memory consumption was 248.5MB. Max. memory is 8.0GB. [2022-03-15 21:47:19,892 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 173.0MB. Free memory is still 131.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 21:47:19,892 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.54ms. Allocated memory is still 173.0MB. Free memory was 130.7MB in the beginning and 129.2MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 21:47:19,892 INFO L158 Benchmark]: Boogie Preprocessor took 17.02ms. Allocated memory is still 173.0MB. Free memory was 129.2MB in the beginning and 128.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 21:47:19,892 INFO L158 Benchmark]: RCFGBuilder took 196.20ms. Allocated memory is still 173.0MB. Free memory was 128.2MB in the beginning and 119.0MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 21:47:19,892 INFO L158 Benchmark]: TraceAbstraction took 748663.49ms. Allocated memory was 173.0MB in the beginning and 886.0MB in the end (delta: 713.0MB). Free memory was 118.5MB in the beginning and 597.9MB in the end (delta: -479.4MB). Peak memory consumption was 234.8MB. Max. memory is 8.0GB. [2022-03-15 21:47:19,892 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 0.11ms. Allocated memory is still 173.0MB. Free memory is still 131.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.54ms. Allocated memory is still 173.0MB. Free memory was 130.7MB in the beginning and 129.2MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 17.02ms. Allocated memory is still 173.0MB. Free memory was 129.2MB in the beginning and 128.2MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 196.20ms. Allocated memory is still 173.0MB. Free memory was 128.2MB in the beginning and 119.0MB in the end (delta: 9.1MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 748663.49ms. Allocated memory was 173.0MB in the beginning and 886.0MB in the end (delta: 713.0MB). Free memory was 118.5MB in the beginning and 597.9MB in the end (delta: -479.4MB). Peak memory consumption was 234.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.4s, 31 PlacesBefore, 20 PlacesAfterwards, 26 TransitionsBefore, 15 TransitionsAfterwards, 142 CoEnabledTransitionPairs, 2 FixpointIterations, 3 TrivialSequentialCompositions, 9 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 12 TotalNumberOfCompositions, 116 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 109, positive: 104, positive conditional: 0, positive unconditional: 104, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 75, positive: 70, positive conditional: 0, positive unconditional: 70, negative: 5, negative conditional: 0, negative unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 109, positive: 34, positive conditional: 0, positive unconditional: 34, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 75, unknown conditional: 0, unknown unconditional: 75] , Statistics on independence cache: Total cache size (in pairs): 9, Positive cache size: 8, Positive conditional cache size: 0, Positive unconditional cache size: 8, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 41 known predicates. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 41 known predicates. - TimeoutResultAtElement [Line: 55]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 28 with TraceHistMax 9,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 41 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 42 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 748.6s, OverallIterations: 183, TraceHistogramMax: 9, PathProgramHistogramMax: 179, EmptinessCheckTime: 0.1s, AutomataDifference: 242.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.5s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7832 SdHoareTripleChecker+Valid, 80.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7832 mSDsluCounter, 2182 SdHoareTripleChecker+Invalid, 67.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 69591 mSDsCounter, 11213 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 196106 IncrementalHoareTripleChecker+Invalid, 207319 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11213 mSolverCounterUnsat, 537 mSDtfsCounter, 196106 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 19568 GetRequests, 5233 SyntacticMatches, 1119 SemanticMatches, 13216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740039 ImplicationChecksByTransitivity, 349.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1957occurred in iteration=157, InterpolantAutomatonStates: 7970, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 182 MinimizatonAttempts, 60289 StatesRemovedByMinimization, 179 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 2.9s SatisfiabilityAnalysisTime, 368.7s InterpolantComputationTime, 7997 NumberOfCodeBlocks, 7997 NumberOfCodeBlocksAsserted, 688 NumberOfCheckSat, 11432 ConstructedInterpolants, 311 QuantifiedInterpolants, 320884 SizeOfPredicates, 1823 NumberOfNonLiveVariables, 22876 ConjunctsInSsa, 12056 ConjunctsInUnsatCore, 541 InterpolantComputations, 3 PerfectInterpolantSequences, 680/25324 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